Worth checking out the intro to the Real World OCaml book as that might answer some of your questions (https://realworldocaml.org/ https://realworldocaml.org/)

Worth checking out the intro to the Real World OCaml book as that might answer some of your questions (https://realworldocaml.org/ https://realworldocaml.org/) Edit: If it doesn't answer your questions, please do leave comments to that effect on the site. It's a beta and the authors are keen on constructive feedback.