It depends on your development direction. All high-end technologies are developed from the foundation. If you don't trust to do a good job as a hydraulic fitter, you can directly debug hydraulic equipment or even design a hydraulic system or a hydraulic mechanical system. You probably don't have this ability. Do hydraulic fitter first, look at detailed things on the spot and remember more. When you are engaged in design, it is difficult to find opportunities to go back to the scene. Hydraulic fitters have several development directions. Now you are laying the foundation. Don't be impetuous, don't be complacent and have a bright future. You can communicate frequently if you have any questions in the future.