Getting on top

I am not super experienced sexually. I've only ever been with my husband and he is usually on top. Lately he's been wanting me on top and I think it's super sexy but I cannot figure out what I'm doing and I don't want to turn him and myself off by being so awkward about it. I can handle staying on my knees and using my hips to go up and down on him if I'm leaning over him with my arms on the bed. I tried squatting over him on my feet and lasted like 10 seconds before I tired out. I guess I just need tips? I'll feel sexy and look more confident if I know I'm doing something that'll work for us both. Help!