Transmigration: Quest system in mafia world

"Powerful" That word was what I wanted my self to be described as but it was a dream that I couldn't achieve. I watched YouTube videos doing anything that it showed me even drinking raw egg mixed with milk, toothpaste and coffee all for the sake of power. I also went to the gym and did excersices that would help me have a fighters perfect body but I didn't even have any slight change. My body remained the same not showing signs that I daily did excersices even after 6 months! During the exercise period, I also tried to learn some martial arts which I think I did learn some and so I decided to try it on one of the people who bullied me but it was a mistake I was mercilessly beaten and later that day I got into an accident due to my depressed state and died but my journey wasn't over. I transmigrated in another world where the mafia existed and practically ruled, as a high school student who was only handsome but slim and weak but I had a cheat, a system that gave quests and gave me rewards upon completion. With this system I was going to become a fighting legend in this new world and achieve my dreams! *** This novel was inspired by the comic Questism so it may look a little but similar but I'll try my best to make it look different.