Be happy about working on things that are feel way to hard - it means you're learning fast. Write code for fun. Find a hobby away from computer for sanity. Co

Be happy about working on things that are feel way to hard - it means you're learning fast. Write code for fun. Find a hobby away from computer for sanity. Consider the risk of burnout - even with great mentor and challenging work a toxic environment is not worth it long term. Care about ergonomy of your workspace now - adjusting height of monitor costs you nothing, good keyboard and wrist rest cost less than you make before lunch. Carpal tunnel, ulnar neuropathy and back problems will start hitting you and your friends when you are teaching peak of your career and are no fun in general.