At what pace should I play the game?

Saw on the internet that the game is around 25hours, after 14 hours of playing I met up with Takemura, then with Johnny and went to clouds but stopped after the mission. I’m kind of afraid that the story will be too fast and I won’t have a chance to do all the sidequests.

Is there some ratio of main quest to sidequests haha?

Sorry if it’s worded weirdly.