Take what you want. You can't succeed alone. Every story of success is a story of people working together, each contributing their own unique talents, skill sets and abilities. Do what you do best. And let others fill in the gaps.
Perseverance always wins.
You can't fail if you don't quit. Find yet another way to make it work. Some call it meditation. It'll make you more effective and you'll accomplish much more. If you don't like where you are today, don't expect tomorrow to be any different without change.