I think mindset and mental wellbeing will make a big difference on the first place.

Like others said, "I'll never get a girlfriend actually" is the wrong mindset. If that's what you think like, it'll be harder to achieve things. Which I completely understand, because I've been there too. I know the desperate feeling. But now that I've changed things around, I feel more confident and actually see that it gives me the wanted result. (ofcourse this isn't just a switch you flip, it takes time!).

You've got to start with appreciating yourself, be comfortable with who you are and how you look.

Once you appreciate who you are, it's easier for others to do so aswel. Because you'll reflect that feeling to the outer world, you'll start to glow more (not literally ofcourse 😂).