Give yourself a chance. Stop saying, “I don’t think I can” or “But what if I am not able to?” and give yourself a chance. This may be cliche, but BELIEVE in yourself.
When you get older, your knees won’t work the same and you won’t have the best memory, and you are going to wish you’d given yourself a chance years sooner. And if you aren’t happy where you are, change it.
Get a new job, move, become a vegetarian, get a new hobby, pick up an old hobby, whatever you do – make sure it benefits you. Life is too short to not be alive, to not be passionate, and overflowing. The cost of not following your heart, is spending the rest of your life wishing you had.