While I don’t have an exact answer for you I do have two rules that I try to live by that had helped me deal with being an adult:
To be an adult, you only need to know when it is apropriate to be childish. - This implies a shitload of stuff, it implies that you know what being childish means, as well as being able to read a situation. I treat it as a reminder that it is ok to keep playing and as long as you do it apropriately you can ignore critics.
Don’t paint the devil on the wall unless he stands in the hallway, but it won’t harm you to have some paint available. - Basically don’t constantly prepare for the worst, but should the worst happen, take notes and analyze the situation, and be somewhat prepared to do so.