Can a 5.25 inch penis pleasure a women or girl and is it big enough how can I make bigger like 6 inches also I am a 19 year old guy will it grow more?

There may be big differences in the way it is measured. Actually, it doesn't matter much; as with most things, there are individual differences in this respect, too. No, you can't make it bigger, and no, it will probably not grow much more than that.