Who are you calling Guts? I'm fairly slender, lol...
Yeah, 15" alloys will fit perfectly fine.
A common size would be 15"x7"...
You will need to make sure the wheels are 4 stud, 100mm PCD and have an offset of about 45mm.
You can fit lower offset wheels (i have ET30 on my car) but there is a chance of your tyres rubbing the arches if your car is lowered or loaded up.
If you get some 15"x7" wheels, you should fit 195/50/15 tyres. They are an extremely common size and relatively cheap too.