Hi.

Quick question about thumb position. So in the fundemental course (which is amazing) the thumb position should be straight up with pressure on the middle finger, you got the idea?

However, for some reason I cannot keep it straight, or in 90 degrees let's say, anyway here's a picture to know what am I talking about.

https://ibb.co/enPGov

So is it normal or not? Much appreciated guys, thank you.