Need help deciding...

So as the title suggests, I'm in need of some advice to aid with my decision on tools. I'm a DIY'er who currently rents a town home. I dabble in the occasional furniture rehaul/assembly, shelf-hanging, etc. Nothing too extreme. I've recently ordered a workbench to which I'll need to attach a bench vise for gunsmithing.

I've been going back and forth between the red and yellow (GASP) offerings and feel like I've narrowed it down to Milwaukee. My question is, given the info above...which would be the best series for my use case?

M12...? M12 Fuel...? M18...? M18 Fuel...? What are the major differences?

I'm not very well versed in this realm so I decided to ask for your guidance. What places offer better deals? Should I go for a 1/2 in or 1/4 in? Etc. What would be the best set of tools to have for my bases to be covered.

Help a brother out! 😅

Cheers!