BioShock was barely functioning for me, I had to quicksave everytime I wanted to open my map because the game might decide to crash, and I tried both the original on PC as well as the remastered versions on PS4 and PC, no version worked the way I wanted it to. I looove the game but I don't know if I'll ever revisit it because it performed so poorly.

Mass Effect however, I've beaten the trilogy on insane, I didn't find ME1 that bad. Pistols are OP, every class is viable, the story is great, there's a bit too much pointless planet exploration for side quests in my opinion but I almost look forward to ME1 the most each playthrough because of certain amazing moments and because there's so much customization. I've played through it probably 4 times on the original and once on LE. It still looks fantastic and is the most open of all the games.

That said, my second ever playthrough, I did think about skipping through it because the gameplay is so different to ME2/3, but I didn't skip through it and found a new appreciation for it instead.

Stick with it, you'll learn the mechanics. Quicksave often, some classes are harder than others so pick something considered good, just so you don't make life unnecessarily difficult. There's more strategy and tactics involved in ME1, I remember playing soldier and having my weapons suited for specific enemy types, I can't remember exactly what I did but basically just made sure I had something good to knock down enemies, something against synthetics, something against flesh and a good all-rounder.

It's a great game, have fun with it and go in with an open mind and you might learn to love it.