Cowgirl tips! Pillow princess?

I’m very new to sex. I lost my virginity back in February and it’s been great but I’m not sure how to be dominate or more active in the bedroom.

I don’t want my boyfriend to get bored. I’m worried about being seen as a pillow princess/not being very exciting in the bedroom.

We tried cowgirl last weekend and it was kind of a fail. So much work! Any tips on riding/how to not be so shy in the bedroom would help!