Understanding 'Immersing'

After a long day at school, Marcus looked forward to playing his favorite video game. He knew that immersing himself in the game would help him unwind and relax. His friends often joined him in his gaming sessions, making the experience even more enjoyable. However, he also understood the importance of balancing his time between gaming and other activities such as reading and exercising. Therefore, he would only play for a couple of hours each evening before completing his homework.

In the context of Marcus's hobbies, the word immersing most closely means: