I'm not a big bluffer at poker , what types of games or tournaments do you recommend ?
You didn't write on what stakes, but I am guessing that you are talking about micro, right?
As for tournaments, definitely some slow or regular tournaments, preferably deep stack. Avoid turbo and hyper, because you have to play aggressively (blinds increase to quickly to be passive). As for cash, I am not really sure
But also, if you want to be better at poker, you need to work on your weaknesses even more than on learning new things. Can you actually write more on why do you think you are not the good bluffer? Do you mean semi bluffs or pure air bluffs? (The latter are used much less in poker than some people tend to think, your bluffs should mostly be semi bluffs)