Start doing the things that you want to get good at in an easy-going, non-threatening way. Recognize that this will take time.
Once you’ve done that and begin to get a feel that you could become pretty good, set goals.
The worst thing you could ever do in life is set yourself goals. Goal orientation is absolutely disastrous. When you don’t meet your goals, you deem yourself a failure. When you do, now what? – Stephen Fry