It can be overwhelming because together with the studying can come a wave of questions where you doubt yourself on a personal level with thoughts.
These thoughts are subtle but can lead to difficult feelings that interfere with motivation. So to generate that motivation you could try some of the following:
It may be helpful to write these feelings or thoughts down and then leave these on the side so you can then study.
Try to become aware of the habit and gently make yourself to go back to the task sooner rather than later.
What will make it easier for you to work? We are all prone to pleasant experiences and it is natural that we tend to avoid uncomfortable, dry chores and duties. So try to make your study experience as interesting as possible.
That’s all I can give you hehe XD. Hope these helps in your future studies.