The "noise" tool is actually good and just has a bad rep! Set it to 8 or below to make it look nice and not chaotic. It's very good for beginners! Later on down the road you won't want to be using it anymore though! Try your best to shade if you don't want to use the noise tool at a low number. (3-4)

Hi, welcome to PMC! I suggest looking for skinning tutorials by great skinners, especially dinowcookie’s tutorials.