Tips for girl on top

Okay so this is SO embarrassing but whatever lol.
So I've been married for a few months now, and I never had sex until I was married so I'm still kinda new to everything. My husband always wants me to go on top, but it's like so hard to me! Like I can never find the right position or rhythm to go steadily. So it never works out. He's so sweet about it but I know deep down he wishes I was better on top... Any advice? Am I just bad at this??