Even as a fully immersed JW, i always found it hard to pray, i found the whole thing stupid. Why should we talk to God who knows everything we think, and knows everything we need before we even ask for it.
Many positive things have happened in my life recently. People have asked me "you must have prayed hard to Jehovah", and i lied and said: "yes, i prayed hard about that". Then they go on to say, "See, prayer works".
When you pray, positive things can happen. When you don't pray, positive things can happen. same can be said for the negative in our life.
This does not mean i do not believe in a higher force (god, or whatever), this just means i don't think prayer has any merit at all and is a waste of time.
I believe in a higher force that rewards us when we do kind deeds for others, and we have genuine love for others in our hearts. Most religions teach this basic idea, do good deeds to others and good deeds will be done to us. Karma.