Seeing that you know so much, I must be eager to learn. You can apply for a job as a hardware engineer, doing microcontroller circuit design, or programming. Those who know plc can also apply for this job. However, if you work alone in a certain industry, the salary is not high. If you want to be high, you must prepare as follows: For example, the key components of microcontroller design are peripheral circuits. I don’t know how many application boards you have made. Those are valuable experiences, and they are made with money. Microcontrollers are very low-end, and the price is just that. Now ARM is more popular, and the higher salary is DSP. Getting started with PLC is very simple, but you have to experience complex applications to become powerful, and you need to know more brands, such as Siemens, AB, ABB, etc. You must also be able to communicate with busses of different brands. If you are good at everything you say, then go to a more advanced one. For example, if you want to make circuits, you also need to know programmable devices, which means you will go in the high-speed direction. Now it feels like you are in a better position than a beginner in a certain field, but overall you can’t do much