Dragon Ball: I have the wrong system and I have entered the wrong world

As a good-for-nothing college student, he was accidentally brought to Dragon Ball by the system and became Son Gohan because of using an irregular power strip. However, after asking the system, our Gohan found out that both this system and this world were actually accidents, because this system was actually a system that should be in the urban world! It can be said that it didn't do much to make me stronger, but there was nothing I could do. I had to rely on myself for everything (this book is slow to warm up, the combat power is not broken, the strength is insufficient at the beginning, the plot changes are small, and the protagonist began to rise rapidly on Namek, higher than Dilisay!!!)...