It is such a difficult thing to help someone with, as we all find our own paths to reading, to genres and to authors. I read (when I do) for such many and varied reasons, and what appeals to me at any given time also varies.
All I can advise truly is that you keep on reading anything that appeals to you. It will eventually 'stick', and you will develop you own preferences and modes of reading. A good starting point might be to consider what type of films you enjoy, and indeed what kind of video game, as they could both help you find a genre to delve into.
For example, if you enjoy strategy games, a book that encompasses battles (the Romans, civil war, Waterloo etc) might be a a way to go. If you are a shoot-em-up player, maybe fiction or non fiction books such as 'Band Of Brothers' type reads, or the genre that contains Special Forces type stories. Again, the type of playing that needs you to delve and explore for clues / gadgets etc might lead you to detective stories or mysteries.
Lastly, if you join your local library you can be doing as much exploring through books as you like without it costing you anything, and most library workers are also keen readers and they can point you in different reading directions. And the forum is always here with recommendations, and we will want to hear about the books you ave read too!