i have a 41 in sneak and can't pp yet, either. i save before every attempt and end up reloading ALOT. i don't like reloading, either.
i'm saving my money to train up in sneak as much as i can. at least with my so/so guild standing i can get each point for about 300.
i'm trying to keep my pp attempts to late at night indoors. that way, i don't have to worry about others seeing me do it.
i'm thinking you might should be over 50 to really be successful at it.
V***V