Just download Thunderstore mod loader. It takes less effort and brainpower than it did to write these posts. Aside from having someone come to your house and install the mods for you, it couldn't be any easier.
Putting the mods on a self-hosted server takes a bit more work, but I don't think that's what you're talking about.

why ? its just for noobs like me makes moding 1k times easer

https://www.valheimgame.com/faq

Q: Will I be able to use mods?

A: We won’t have official support for mods.