It went okay, but after I mooded my Wii U the first time my SD card got corrupt so I needed to do this aaall oover again.. Luckily, now everything works as it should. Did you have any problem with this?

Nope.

all homebrewing processes worked fine for me, but i can't get the internet game functions to work( such as splatoon turf war and friending people)

Homebrewing was very smooth, instructions are simple, they shouldn't take longer than 1-2 hours. Everything works great so far on my end! As long as you follow the official guide, you'll be very fine.

Had experience with modding my old Wii, so it wasn't that hard! The key is to follow tutorials carefully (videos on yt are recommended only if they are pretty recent, cause they could get outdated pretty easily). The only trouble I had was with splitting volumes on my usb tbh √

it freezes sometimes but a good unplug fixes it.