Thanks for all of your replies. I thought about this stuff a lot this week and decided that this year, for academic work, I am going to just focus on reading with my boys, which we do lots of anyway. I ordered The Story of the World, so we could start reading some history, and also The History of the Ancient World for myself. I like the idea of adding one subject per year so that we can slowly get used to this. I already often read classics, so I will just keep doing that and just switch my focus to works that are more fitting with the period we are working on. It already feels better to be focusing in this way for myself, instead of just reading lots of interesting works that are all over the board historically.
I also started Latin this week, which I have been meaning to do for years. I have had Wheelock's Latin book on my shelf for at least ten years, but just kept putting that off so that I could study modern languages instead. Now I am realizing that I was going about my language study all wrong! I am having so much fun with it.
Thanks again for all of your advise. It really makes a difference to hear what other people did early on when beginning this path. The nebulousness was disconcerting, and though I do definatly want to keep it fun I really need have at least a vague idea of what we will be doing. Happily now, I have that.