Whether it is necessary to go depends on your own situation. If you are not an IT-related major, or if you don't study well enough and want to engage in IT, I think IT is an option to go to an IT institution for training. My brother just graduated and can only do telemarketing, then went to training for four months and learned Unity3D. Now I have worked in an Internet company for half a year, and I switched to being a programmer, but I spent a lot of energy in the middle, typing code every morning. The good news is that the salary is not bad, and it is what you want.