5000 hands is plenty of hands to determine your type. It's nowhere near enough hands to determine your win rate, but your type, in terms of your general behavior, is already quite clear.

As to whether it's OK -- it's certainly not optimal. If you play well, you can still be profitable, but you're leaving money on the table. Is it good enough for you?

Why are you asking? Do you not want to play your best poker? Do you fear the variance of making large bets and raises? Or are you still uncertain of when that aggression is correct?

If the variance of the big bets bothers you, you are playing at the wrong limits. Never mind the size of the blinds; they dictate the size of the game, but only by starting the action; those bets at the end are the result of the blinds. If the late bets make you queasy, you're at the wrong limits.

If you are uncertain of when aggression is correct, being passive is fine while you learn. You're better off being rated a little too passive and missing some bets and raises than you are being rated properly aggressive, but achieving it with Dumb Aggression.

You don't want to be aggressive for the sake of having a high AF; you want to be aggressive by making smart moves. Keep studying when and how to make smart moves, and your aggression factors will creep up.

By the way, don't forget that half of the equation that makes for a high aggression factor consists of NOT making bad calls. Making bad calls will drag down your AF as surely as failing to bet.