How do you keep all of your mistakes from weighing you down? When I look back all I see are failures rather than lessons or trying something for the first time.
maybe it comes down to whether or not you really believe that you have it in you to be who you want to be. maybe it would help to read/watch some biographical content, and find out about all the many different flavours of mistakes that successful people have made, and still may continue to make. you can start to relate to them