> I tried to ask my hotel, but it looks like they dont understand what I want or need. So I downloaded the app - but as guest I cant register, correct?
Correct. I suggest showing them a copy of a printout of a TM30. It's called "Section 38". If you show them what you want, they should be able to produce it for either the middle or bottom part. If they still don't know what a TM30 is, show them this movie
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(It's from the Thai government. It's in Thai, subbed in English)
>Should I maybe switch my hotel to be sure I'm at a place that does the reporting?
That's an option, but make sure they will complete.
>For the other self register things I need document from my hotel?
IF you're using Bangkok Immigration, and you want to self register, you need a lease. I don't know what the self registration process is for other provinces though.