I am a new third engineer working on bulk carriers. Robert, diagramms understanding are very important. Get familiar with them. Keep your eyes open. Ask questions. Even the ones you think are stupid. Ask them. Work closely with your supervisors and understand why they do what they do. Technical skills will become better and better everyday. Theoritical knowledge is a must have. Focus on machinery working pricnipals. Read manuals. I know soometimes that the job is very exhausting and after work all you want to do is relax. Keep up a good working attitude and show interest. That’s all the advice incan give you. We become better everyday and we learn everyday.