Good job OP!
Don't worry about cropping. It's part of photography. Nobody's perfect.
Also sometimes, during processing, you'll suddenly realize there's a better framing you can use than the one you used when you've taken your photo. E.g., for those moving insects, sometimes, you don't have any time to re-position yourself or your camera so my technique is just to frame it as close to what I envision it to be and crop it later.