The only problem i have across is speed of my brain, i want to understand faster, for example i want to complete a whole material of abstract algebra (for 2,3 y

The only problem i have across is speed of my brain, i want to understand faster, for example i want to complete a whole material of abstract algebra (for 2,3 year ungradate math students) in one week or less. But my brains says nah. I keep pushing it, but after 7,8 hour a day, its performance hits a block and i have to play game or talk to a friend to start again.