You have a very good starting position! Just saying that first and foremost. Good looking face & hair. You are still young and your appearance will naturally change a bit until you are 23-25, when your sex hormones peak.
I would recommend you to workout, adopt a clean diet (tracking macros + highly recommend „The Vertical Diet“ by Stan Efferding - you can find a lot online about it, it’s pretty simple) and increase calories to lean bulk. (300 calorie surplus per day)
You will likely become a frickin‘ machine.
High vitality, high testosterone, good health.