Re: do you rest your pinky on pickguard?
Most of the time I rest my pinky on the pick guard of my strat. Occasionally I don't rest it there but when I do I find I can miss string. Although I can also do Pete Townsend-style windmills and still hit any single string that I want.
I wouldn't worry about people telling you that resting your pinky is an incorrect habit that you must break. There are a lot of things that are "wrong" that sound good
Technically speaking, gripping the neck with your thumb over the top ( a la Jimi, SRV, and Jimmy Page) is incorrect but every body does it. Heck guitar feedback was considered a problem way back!
If it sounds good , play it. Try learning both methods (resting Pinky and not resting pinky) then decide which sounds best and is easier for you.