Yes, get the lift. It IS life changing. (for the better) Whether 2 or 4 post is a personal decision and up to no one but you.
I went with a 4 post because A.) I'm already old. B.) My knees were already shot and C.) Arthritis makes all of my other joints hurt too so I hate to come in to contact with concrete because it activates my allergy to pain. D.) While nothing is idiot proof and without risk, a 4 post seemed the far safer of the two types. Pictures of vehicles that have fallen off 2 post lifts are ubiquitous, even in professional shops. No so many pics for 4 post lifts. E.) If you go with a 4 post, yes, you probably should get at least one bridge jack and if possible, 2 of them. Buy once, cry once and all that. F.) I'm old, retired and slow already & certainly not trying to beat book times so if something like a brake job or rotating tires takes a bit longer on my 4 post, I don't care. F.) (for finally!) I store my old truck up on my lift and if there is one area a 4 post lift kicks a 2 post lifts ***, it is certainly for storage.
I will concede I did strongly consider a 2 post lift. They have their advantages. And a few disadvantages. Just like my achy old body was the deciding factor in buying a lift in the first place, it was the deciding factor in what type of lift I ended up with.