Newbie needs help ...

It all depends on the look you are going for, and how much you have to spend.

Also there might be suspension mods, brakes etc that might prevent you from going to a 14 inch wheels.

Find out you bolt pattern 5x4 or 5x4.5. more choices in the 5x4.5.

Also more choices in 15" and up.

If you know that your current tire wheel combo fits without rubbing use that as a baseline.

There are tire size calculaters online that will let you compare your current size to others

watch out how a wheel is measured for backspace, from lip of rim or from flat of rim, (where a weight would sit)

If you can try a wheel tire combo on, that would be best bet.

see if anyone you know has a look you like and if they will work with you, try one on for size!