If you read through bookie tutorials, you will, more or less, gain an understanding on how a bookie works, and the products that a bookie offers. The many sports leagues that you can see in sportsbooks do not run throughout the year. Each sports league will have different schedules on when they hold their respective seasons, so your sportsbook will be offering a different variety of events each month.
In US sports betting for instance, now would be sort of slow in terms of having a lot of sports events happening. The NBA season has just ended, the NHL is about to end in the next week, and you will only have the MLB, plus a few other international events from tennis and golf and racing. Thus, now is the perfect time to learn how to be a bookie in 5 steps, so that your sportsbook will be up and running just before the peak season of the year starts.
Generally, sportsbooks are always busy. There is always something to bet on. But what most in the business would call peak season would be football season. This starts September, when the NFL season opens. You will also have college sports starting, both football and basketball. The NBA and NHL season will not come in until late fall/early winter, though. But college sports and professional football alone can generate millions in wagers each league during the active season.
So starting now with a bookie pay per head sportsbook gives you the time to learn your way around the software, practice managing lines and players with the current offerings. That way, when the sports betting industry becomes truly busy with wagers, you and your sportsbook will be ready to take in bets, and earn money as a bookie.