+1 more for Thunderstore. I didn't like Vortex much when I tried it (1,5 yrs ago), also there where controversies about ownership of mods on Nexus - but I don't know the details or the status of that currently.

When on Thunderstore, be aware that you don't have to install the whole wolf-thingy software from them, only R2Modman (at least if you just modding Valheim).

R2Modman takes care of any dependencies (f.ex. BepInEx), and updates. You can also make profiles and play vanilla.

I've only used 1 Mod - Planbuild - which is for making 'Blueprints' of (any size)builds, so you can export them to any seeds/worlds. It also has basic terrain tools. R2M installed for me 3 dependencies for that 1 mod.