Please, please, please don't think or feel that. It's wonderful. Well done. The first ones are always the hardest. So, don't stop now.
I've just addressed one point from what you have written - the question of cropping to assist with the composition. And I've just used your first image for that purpose, because I think it is the more powerful image to work with.
Before I got into that though, both of these need to be rotated to even up the horizon. You can see that in your copies, the horizon slopes down to the left.
So - what options do we have? There are many ways to skin a cat, as they say. And in the end it boils down to your preference. Or maybe more precisely, it boils down to the vision you had in your head of what the final image would look like when you pressed the shutter.
Here are three variations on your original. The first is a 7 x 5 ratio crop. The second is a 1:1 (square). And the third is a 16:9.
I'd suggest you assess each of these against what you wanted for this image. Do any of them work better than your original? Which, if any, makes a more powerful image than the others? Why?
If you place a rule-of-thirds grid over each one, you'll see that key areas fall on a cross-point in that grid or on one or other thirds line.
Click on the first one to view in the lightroom and them press next or previous to alternate between them