How to be more confident with girls?

Is there any advice for those people who are very insecure, but at the same time want to become more open?

You probably just need to get to know someone better. When you get used to it, you will become more confident in yourself.

What really helped me was to use dating apps, maybe you can do the same pal, I started with this one datinger.uk/reviews/flirt/ and after a while I really got confident with my dates and talking to girls, so I  believe this is going to be a really good option for you pal, give it a try and let me know what you think about it.