I'm not prude but was wondering how I go about being more aggressive in bed?

Aggressive? . If i recall u r 52 years old , why u want to be aggressive in bed , after all " with honey u catch more flies".
It takes small steps. Think about something you would like your partner to do that would be aggressive and see if you can turn that around and make it go in your partner's direction. Like many things in life, getting something in motion tends to help keep it in motion. Get some momentum going your partner's way. Have a plan - don't leave it all to chance.