First things first, you need to put the thought out of your mind that you’ll never succeed at anything. All you need to do is pick a direction and start. You’ll find that the journey might be pretty windy, but the good news is that you can succeed, at every stage of the process.
If you concerned that it’s simply unrealistic for you to aim for something you know can’t immediately be achieved, look to get into a related field, and then aim to move across later. Plenty of people do it! The most important thing is to be persistent, find an area of passion and pursue it.