In fact, as long as you do the project in a down-to-earth manner, it will be done in three months, which is better than studying for one year.
If you don't know where to start, you can go to the website of Lingyang University to find examples (of course, the microcontroller doesn't have to use Lingyang, for example, I prefer AVR, but there are many examples there). After reading it, you will feel that the level is not enough, and there will be a lot of gains after you really do it.
Training institutions are all fooling people, so my teacher fooled his students and divided the class that was finished in one day into two days. Do you understand what happened? No one wants to tell you something really useful, but you have to explore it yourself. This is the unspoken rule of this industry, and it only teaches you the skin.
Do it yourself and have plenty of food and clothing. Master Mao is right.