Be who you are. University is the perfect time to start over.
By being true to yourself and being who you are you will make real friends. People do tend to be way more accepting at universities too, as there are all kinds of people there. I met someone who identified as a cat last year, and even that person had friends.
Society has definitely progressed a lot, and I think the people you tend to meet at uni are the most accepting ones because they are younger, more aware, and generally dont share the views of the generations before them. If you are unlucky enough to meet one person who does not accept you, I can guarantee that you will meet ten people who will. If they dont accept you that also says more about them than you, you shouldnt have to hide who you are because of their ignorance.
I think you should be yourself from day 1, and people will thereby love you for you.