Congrats, and I think you can do it!

Regardless of whether you are homeschooling or not, you are probably going to be tired (I sure was with my last pumpkin). Maybe this is just me, but for me and my boys, I found it easier to start homeschooling after I had our last baby. We did about 3-4 weeks after he was born (he had a 2 1/2 week stay in ICU). Anyway, starting school gave everyone something to do that was fun and full of importance, and I also felt it helped me spend time with each of the dc rather than just the baby. I would have been tired regardless, and sometimes, it's just easier when kids know the next thing to do rather than constantly having questions all day long if we're not doing school.

One thing that helped me was to try to figure out what the little ones would be doing first. I planned out 30 minute activities for the toddler/preschooler, and then plugged my olders around that, making sure each of the olders had a playtime with toddler/preschooler too. You could even spend a week just getting toddler/preschooler's routine down. We have done that, and it's going to make my start tomorrow much easier. Here's what my little guy is doing for example:
8:15-8:45 or 9: educational video in entryway/play area
9-9:30: LHTH with me in kitchen
9:30-10: Play with Riley in entryway/play area
10-10:30: Play with Wyatt upstairs in Riley's room (3 times a week Lakeshore boxes, 2 times a week educational computer game)
10:30-11: Snack, drink, blanket of toys
11-11:40: Play out with playroom toys while Riley watches a video near him
11:40-12:15 PM: Kumon books, puzzles, at kitchen table with me overseeing all 3's semi-independent work
12:15-12:45: Play out on main floor (can watch science experiments if interested)
Anyway, I hope that helps, and I think you'll do just fine!!!

Starting half-speed would work too.
In Christ,
Julie