I wanted to clarify the question on the bounty. If I did not have time for the first weeks, can I still participate?
Of course. You can participate until the end of the bounty, and there they have a different duration of the event.
Do I need to create a wallet now or can I deal with this issue a little later?
If you participate you will need it now. This is indicated on the bounty member registration sheet. For ordinary users, you can attach a wallet to your account at any time.