basketball photography

Hi! I wanted to try doing those great action /sports shots from those press sports photographers (since I do plan of becoming a sports photographer someday in the future), and here are some of those photos that I've taken and tell me what do you think of them. Are they good enough or not? Here...

Hi and good day! I am just wondering how does the sports photographers' photos look very bright, high quality and well-taken, compared to my shots on my Canon EOS Rebel T5 that are just mediocre, average or okay quality. I really wanted to do their shots someday, but I don't know how they do it...