If you struggle with a certain angle, then draw the angle you r best at drawing and draw some straight lines that show important parts that you should look out for

Here, I drew lines for the ears, chin... They shows me where they r supposed to be on the different angle!

But most importantly, the best way to learn a new angle (or any skill) is to go out of your comfort zone.
It WILL look bad at first, but that's exactly what u need:
a place to start, to improve from!

Now go tackle that angle!