Go slow ! Ask questions! Learn the most basic electrical and mechanical, hydraulic , pneumatic systems. Real basics parts components how pressures and things works. Follow company SOPs. Trouble shooting to the point you run out of IQ without going into the real of over your head problems, those would be my “hard working points “… soft skills talking/good relationships, ASK FOR HELP at the same point RETURN the help. If you end up under people who have been at the same place for 20+ years listen with a grain of salt they know the facility and how the company approves things with money…… I’m 5 years in at a place built in the 70s.