That is how we all start my friend. Repetition will bring improvements.
You are already ahead of the rest of the world who never made leather work. Now it is just a matter of how good do you want to get? The more you make something, the better you get at making it. Simple as that. Look at your finished work. Think about what you would do different/better next time and do it. Then look at your new work, think about how to do it better and get after making a better one, and so on. Repeat this until you are so happy with your results that nothing on earth could stop you from crafting more. And enjoy.-
As far as dye.. how are you applying the dye to the leather? The leather dyes darken the more you apply them. One good coat dries much lighter than several good coats. Depends on what you are going for. Test on a scrap piece of leather and note the results after it dries. You may also think about getting leather that is already dyed and skip the coloring all together.
When it comes to leather work, round is always better than square. Generally, rounded inner corners and outer corners look more pleasing to the eye than 90 degree sharp corners. Also, as someone already mentioned, symmetry is king. Plan out the location of where things will go ahead of time and make sure it will be symmetric before executing.
One more thing. You will make mistakes. That is ok. When you notice you've made a mistake, don't stop. Keep working on your project until the end, there may be more mistakes ahead and it is better to make them sooner and learn from them so that you can avoid them in the future. So always finish the piece you're working on even if there is a flaw on it. There may be more things to be learned yet from that one project.
Hope this helps. Looking forward to seeing your next piece of leather work Cajundad!