I've had this problem before, but don't be in a hurry to get in touch with society and work.
These problems will gradually disappear with your study of this professional knowledge.
Generally speaking, after freshman year, I only study some basic courses, which basically do not involve the specific knowledge of my major.
Based on my experience, I have the following suggestions:
1. Grasp the time of freshman year, play as you can, and it's best to participate in more social activities and meet more people, because freshman year is the most relaxing year in college and also the year of building contacts. If you mix well, you can get to know some brothers and sisters, and you will get a lot from chatting.
If you think playing is a waste of time, I suggest you go to the school library and look for books related to your major in the library area. Don't read too abstruse professional books, find some interesting and simple books and make some reading notes to lay a foundation for the future.
3. If you feel that there are few courses, you will skip classes selectively. Choice is very important. Find some interested teachers or teachers with good school reputation to listen to, and take a notebook with you to take notes. If you don't know, you can check the information in the library.
I hope I can help you. Enjoy your freshman life.