Re: Wallet, you should be able to go to your profile and add your breez address there. It's usually in the profile edit page but each client is a little different.
Re: bots – it's not free from bots. I think it's just so early that most of the bots are actually genuinely useful. Check out nostr:npub1tsgw6pncspg4d5u778hk63s3pls70evs4czfsmx0fzap9xwt203qtkhtk4 for instance.
As Nostr gets more mature, I'm sure we'll build out better tools for managing bots, spam, etc.