Pay attention to the guides. Yes, indeed there's a lot to read.
Yes Coinos is custodial but could be really anonymous, non-KYC. Instead Muun is tracking you because you CANNOT install Muun WITHOUT Google services. That means they already know WHO you are, where you are. Just keep in mind that.
But you will never learn new stuff and how to better use bitcoin if you do not read. All my guides are made after I tested all solutions, during all these 10+ years in Bitcoinlandia. Are not there to bullshit you.
Read, analyze, choose the best solution for you. If you still want to use Muun, so be it, but is better that you would know all the aspects.