I have several hobbies to spend my free time.

One of my hobby is reading a book. = One of my hobbies is reading a book.

Frankly I don't read a lot of books.

I keep reading one book a month at least. = I keep reading at least one book a month .

My favorite genres are economics, psychology and self-development not fiction. = My favorite genres are economics, psychology and self-development but not fiction.

Second one is weight training. I don't have a muscular build. I realize the fun of weight training.

I go to a gym three or four times a week. = I go to the gym three or four times a week.

I can learn how to do a weight training effectively through web. = I can learn how to do weight training effectively through web.

There are a bunch of experts who share their know-how. Last one is watching a computer game. There are so many game broadcastong by professional company and private channel. I prefer to watch a private channel. Because I can communicate with a private broadcaster with chating. If I want to reward to caster, I can donate some money too. However I have not made any donation for those caster.