Do it. All mass effects are great. Even Andromeda ( despite the lackluster story )
I've been itching for a similar game these past few weeks and I swear there is nothing contemporary that is quite like Mass Effect. KOTOR is close, but is has aged like milk ( graphically ). Maybe the deus exes? I am still open to suggestions.
Also you'll want to play the legendary edition, I think they fixed some of the less pleasant gameplay quirks ME1 used to have.