Google "Hive Keychain" and look into it. Should be able to find everything you need for that including the information on how to use it. I can't walk you through it and I don't have any links or material readily available. If the site says "sign in with keychain" it supports it. The keys stay in keychain. You'll rarely have to deal with keys again. I think it handles multiple accounts as well but I only have one so I never tested it.

Once it's setup, you won't get that error. You'll get the hang of it. And I really enjoy PeakD. At first I hated it but that was just because I was used to the old hive.blog site and steemit before that. PeakD seemed confusing. Once I gave it a chance and learned all the cool features on my own, I can't go back.

As for the issues. You and I can't fix these things. lol I'd love it if I could come here and never have to talk about the platform.