these my desgins so far pls download an like them
A few of these are looking pretty good mate, just keep on practicing and you will get better and better. In the future you should avoid using stock fonts/logos and also avoid uploading just plain colors.
as Ace said, the stock fonts don’t cut it in most cases same as standard logos, practice makes perfect, push your self out of the comfort zone and you will be amazed at what work you will do, and this is the best place to learn and ask for advice, the community of painter on here are great!!
good luck for future paints and keep at it, the audi R8 has a great base try working from that