I’ll give you some advice, even though you didn’t ask for it. Keep going. Don’t worry about whether you’re satisfied or not, not yet. The most important thing is to get that first draft out of you. It may be hundreds and hundreds of pages long, and you may only keep half of it. The most important thing at this point is to get that first draft out! I wish I were in your shoes. It’s exciting, no? The act of discovery is rejuevenating. Anyway, don’t worry about writing too much or whatever. I wrote over 200,000 words on my novel (in different stages, what I thought was the final draft was 120,000, and now it looks like I’ll be able to tell the whole thing in 85-90,000. It’s different for everyone, but this kind of thing is not uncommon.)

Anyway, I have an almost complete faith in the writing, and I think that the best time to do it is when you have a lot of superficial stuff going on in your life. If you let it, it starts to act as a filter. So keep going.