I want to sing while I am playing guitar. either I miss the strum or I miss the tempo of my voice. How can I combine these two?
One thing that might help you is to practice them separately. First learn the guitar part; you should be able to play it fluently without thinking about what you play. You should be able to play the guitar and talk to someone. After you've mastered that, you can practice adding the singing part. If you have the guitar part fluently, it will come easier. If not, try to learn the sing part on its own. After you've mastered this one as well, add it to the guitar strumming and practice them together.