You aren’t a late bloomer. You are nineteen years old. You are a seed that has only recently been planted. May I ask if you are a native English speaker? You need to slow down, take one thing at a time, write ( yes, write ) out a goal, write down what it takes to achieve that goal ( do research if necessary ), make a step by step plan to do those things – with tiny steps you can do each day, and then put in the work.