inHistiming - I can see how difficult moving so often would be, and I know it can be even more stressful with a baby. So, my first way of encouraging you will be to add you to our prayer journal as a family and pray for you. You are a wonderful person - such an encourager to others on this board, and such a Christian lady in the way you respond, always.
I'm not sure if this will help with your situation or not, and if not, just ignore this advice - but one thing that I've had to work through over the 15 years my dh and I've been married is realizing what things I need to accept, and what things might change with time. I love my dh very, very much, but one thing I've had to come to grips with is that he will always be gone a lot. Whether it's for his job, or for his outdoor sports, he is just gone a lot, and if anything it has increased more and more over the years. He also does not always tell me in advance, and he sometimes leaves earlier than planned or stays later than planned impromptu. I've come to realize that he will be gone a lot in our marriage, and that is not something that is going to change. However, things that have been able to be changed are him calling me when he's gone, so I know he's safe and we touch base. Also, he does understand how much I appreciate knowing when he's going to be gone ahead of time. Turns out he didn't like to tell me ahead of time because then I was just sad or I nagged him about his leaving

until he did. Hence, I have stopped that - except for a few weak moments.

I know he is a good and faithful man, he does love to be home when he is, and he works hard at his job - he plays hard too - but he's always been this way - being honest with myself, he was this way when we met.
I tell you all this in case something you'll need to accept is your dh's career causing you to constantly move. Maybe that's not a reality, but if it is, and it's not going to change - better just to try to accept it and plan for it as best you can. I'm NOT saying this is easy, but it is easier than being let down time and time again because it isn't going to change anyway. I had a very wise Christian friend point this out to me, and when I first listened to her I did not want to hear it. When I prayed about it and thought about it for awhile, I realized I needed to have a teachable spirit, and that she was right. BTW, in part of our life, this is quite a new way of thinking for me, and one I need to work on daily to have.
I also realized my dh was not going to be doing errands of any kind. I kept trying to have him pick up this or that, or drop off something, etc. I was so upset when he never got to it. Hence, me accepting he will not be doing errands, and me figuring out a way I can and not go crazy toting 3 dc around to do them all. From this acceptance, I set aside some money in our budget to have a homeschool girl come in the afternoon for a few hours several times a week. I feel like a new woman! I can get all my errands done, go to doctor's appointments, etc. and not be bothering my dh with these things nor be waiting for him to make them happen. He's happier too, though he's still not sure it's worth the money, but is o.k. with it because I've found a way to make some income to cover it.
My dh has a lot of fantastic things about him, but we all have things -
me included - that are not so easy for our spouse to deal with. For you, whatever you can do to make moving go more easily and get it down to a science (though you probably have already), would be helpful. Also, as far as the grammar and school, unless your dh brings it up, I wouldn't bring it up. I wouldn't talk about it at all, but instead just be cheerful and general about what's happening on the homeschool front. I found I was making my dh worried by all of my sharing my thoughts about this or that all of the time with our homeschooling, and when we were just quite happy he was happy and not concerned about it anymore. However, maybe your dh does bring homeschooling things up all on his own. If so, maybe reminding him of the talk the two of you had already about the English would be sufficient. If not, you could ask him to specifically tell you what it is he most wants you to do with the grammar - or if it's just everything in homeschooling he likes to keep tabs on, maybe you could have him name his top 3 priorities homeschool-wise or so - if grammar is at the top and a certain level of it is important to him, maybe just do that certain level slowly over 2 years, or just know to hit it hard if he really wants it done in a year. Maybe ask if he'd be willing to help if you think that could go well. I do think asking our dh to verbalize what is truly most important is very helpful. I just did this with another topic I won't go into the other evening, and his answers were so simple I don't know why we hadn't had that talk before.
Anyway, as I said, I think you are an incredibly loving, patient person, and moving that many times would most definitely be hard on anyone. I hope something here can help, but if not, I know my praying will, as God is always better at helping than me anyway.
Love in Christ,
Julie