So like in the title, I'm really curious if we have some book authors here.

I've started writing recently with a vision to publish it after its done, but I'm a newbie in this topic and would rather avoid some wasted effort, just because I didn't ask someone more experienced for tips ;p

So if you have written a book and put it in amazon kdp etc, do you have some tips on things I should do or avoid?

I would also love to hear what you have written :D