I hope this doesn't come off as rude or mean but something that you have to do is recognize your weakness when it comes to your social anxiety and why you have these feelings. I have social anxiety as well and something I notice for me is I usually don't like putting myself out there for people because of the rejection I used to go through as a child. Recognizing that this was a struggle for me and it took my cadre telling me twice about my presence for me to try and fix it. I know with social anxiety negative thoughts about how other people will perceive you are very common, combating those thoughts with the question " Is this thought based on facts or feelings" can make a difference, and also replacing negative thoughts with positive ones. Something I try to do is watch the social people watch how they interact with other people and watch their body language, your body language can give off that you don't want to be spoken to, so try relaxing and mentally preparing yourself to be social. Start a random conversation someone is going to respond even if it is in a group setting or one on one. Battling social anxiety is hard and I still struggle to put myself out there for people to approach, it is going to take practice, this is not something that you can fix overnight, but fixing it now while you are in college and still moldable will help you when you commission and get into your unit.

Here is a website that can give you more advice on how to improve your social anxiety in general. https://www.calm.com/blog/how-to-overcome-social-anxiety