Personally, I’m waiting until 1.0 until I play again :)
Given how recent the 0.17 release is, if you were to jump in right now you might hit a bunch of bugs that would sour you experience. (The last three FFF have been about all the bugs and crashes they’ve fixed after the 0.17 release, including some bugs in the new tutorial). If you wait a month it’ll be a lot more stable.
…yet if you wait 6 months 0.18 or even 1.0 might be out… maybe. I have no idea on the release date there.
Conclusion: Depending on how risk averse you are, either start playing TODAY, or wait a month for 0.17 to be a bit more stable! By that point you’ll be hooked and either a) still be playing when 1.0 is released or b) want to resume playing when 1.0 is released ;)