Struggling with learning? You might doodled before in class and there is a reason for it: movements like drawing and writing help the brain to learn better because it can create more "connections". It's like you remember a situation when you hear a specific part of a song you heard back than in this situation.
Some people do need something in their hands to turn their energy into focus - that's why fidget gadgets are so popular. But you actually don't need them because you can use a regular pen and learn some tricks. Helped me a lot and does still. :)