Just send the forms in now (and DO NOT SIGN part II of DS 230!!!)
and start preparing, which means having one of the three points mentioned, a job or proof of being hired once in the US, enough financial founds of your own, OR a sponser (which you proof with the affidavit of support). They just want to make sure that you will not apply for any help once in the US. They want you to make it successfully on your own (or, with the help of a sponsor!)
The address you mention in the forms are either an address where you now know you will live (eg someone who has a partner in the US, or moves in with family who are already living in the US). I wrote "N/A" as I do not know that now (I have read that you need some kind of address by the time of the interview and like yours, mine is also months away, which is good for the preparation!)
Then the address next to that is a postal address where they will send your papers to. You also include the name(s) of the person/people living there. I put my friends address as this is where I want my papers send to.
If you have such an address now, write it, if not you should still be okay, but I am not sure how that works (better to have an address now
). In any case, you do not need anything of proof for financial abilities, but you do need that by the time you have an interview.
I also read that people with high education often do not need to show either as they have a very good chance to make it in the US by themselves, same for business owners.
Hope this helps. Just fill out your forms and send them to KCC and start preparing, ask any questions here if you need help. Many people did this before us and they are all very willing to help us! Its great--and so to all prior winners, as well as all other people, thanks for helping out