It is not seen as good to upvote your own posts and comments, because it is seen as you aren't engaging with the community instead you post or comment because you only want to "milk" the reward pool. If you do it, you'll be a target of larger stakeholders and downvoting you.
You can comment on your posts, no problem. If you always think your actions are to engage with others or explain things, I think you won't have any problem.
Also, you can post-edit your comments and posts.
Regarding the rest of the article, I'll try to answer some later ;)
I don't know if you already know but, peakd.com has a section for a FAQ: https://peakd.com/about/faq. Maybe some of them you find answers there.
Also. You should probably go to the discord of hive: https://myhive.li/discord
And discord of the peakd.com team:
https://discord.gg/Fy3bca5
Another helpful resource, thank you @marc5 ! :)
Edit: Also thanks for replying/upvoting/reblogging, I really appreciate it!
Thank you so much for explaining!
So I'll include in the guide:
I didn't know about that FAQ, I'll see if it answers anything, thank you.