Just some random advice on the 20 years old but never dating thing. I was on the same boat and didn't have a girlfriend until I was 23 but I hit the ground fucking running in that relationship because of one simple thing that I did while I was single and that was to OBSERVE. If you know anyone in a relationship (the closer you are to them the better) then just observe and take many mental notes about what's good in their relationship, whats bad, etc. Do it as much as you can without being intrusive.

I have 2 close friends one is in an amazing relationship and one is in a toxic relationship. I have always been single and played the role of 5th wheel for many years. I finally got into my first relationship at the age of 23. Now I did get lucky and met an amazing girl but I knew exactly what I was doing from the very beginning of the relationship and hardly made any beginner mistakes despite my lack of experience, and that's because of the time I spent observing a healthy relationship and a toxic one.

So yeah don't worry about the fact that your 20 and have always been single. What's important is working on improving yourself, learning to love yourself, learning what you can about the difference between a good and bad relationship, and when the time comes you'll hit the ground running too :)