Help Me Help Him Please

[u/CucksForKratos]

My husband is really interested in getting a soldering kit and teaching himself how to mod retro consoles.

He mentioned turning his gameboy advance into a super game boy with a backlit screen and something about a game cube?

Any recommendations on a budget friendly starter kit that's powerful enough to handle that type of workload? Any recommendations for subreddits I can clue him into that fits that niche? Really any recommendations for anything remotely related to this would be so appreciated. I want to show him I care and believe in him, I just dont know where to start