The most important word in this sentence is not accomplishment, nor try. It is decision. Deciding to do something can be terrifying, but once it is done, things get easier. You limit yourself to only a few options, and then you have to face those options, making the best situation out of them.
When you do this – set your own limitations – you get to be creative in how you make the best out of the situation. You’ll probably surprise yourself with how well your decision turns out.