One of the best pieces of advice I’ve ever heard in life is: “Don’t dabble”. Simple as that. If you’re going to do something, commit and give it everything.
From building a fast growing company that will dominant your industry, to training for a marathon or baking a cake, dabbling won’t get you there.
No matter what you plan to do, big or small, I reckon the only way to really nail it is to be all in.