Yes, I agree with Jennipurr - take this in babysteps. Check out the blog Mr. Money Mustache for ways to start budgeting immediately. Mother Earth News has loads of articles on homesteading. This is a huge life change you are taking on, and it sounds very exciting and fun! If your partner is a stay-at-home parent now, you could start homeschooling right away. I've been homeschooling my dd (13) for about 7 years and it is not difficult (scary, and sometimes complicated, but not difficult.)
Best wishes to you on your journey!

lHamo - thanks for Penelope Trunk! I am enjoying her homeschooling writing.