Yeah, I mean, the eternal BG1/BG2 question is kinda tough.
BG1 is all about very low-level D&D combat, which can be pretty hard to get into. Expect to miss 90% of the time or more. It's also considerably more directionless/open, which isn't necessarily a bad thing, but does make the game even
harder to get into. Lastly, BG1's story is very minimal. It barely has a story for 10-20 hours, honestly.
BG2, on the other hand, is basically a God-tier RPG in virtually every way. Incredible writing, high-level combat means your party and everyone you face off against can be extremely deadly. Maybe the greatest RPG city of all time. A truly ridiculous amount of content.
I suspect that
a lot of people tried to catch up on CRPGs with BG1 and ended up abandoning it. It can be rough, even with mods. But even so, it's hard to recommend jumping straight into BG2, since it's a direct sequel.
I say try BG1, and if you can't get through it, drop it shame-free, read the story spoilers, then jump straight into BG2. You're almost guaranteed to have a better time there.
Get the Enhanced Editions, or get the games off GOG and mod them. I'm an idiot when it comes to PC gaming and modding, and I played BG1 and 2 from GOG with mods no problem. There are pinned guides on the GOG BG forum that make it fail-proof.
Edit: If you do play BG1, follow this guide. Don't listen to anyone else - this is 1000% the best one:
http://www.forgottenwars.com/bg1/. It's what finally allowed me to get through BG1 after 4-5 attempts. It's story spoiler-free, it includes complete maps, and it's comprehensive. It'll tell you to loot every dresser, etc., but any part of the checklist you want to skip you can skip.