Here are some tips you can practice step by step :
1. First, learn the song properly so you can memorize it without too much trouble.
2. Play the song on guitar while watching TV.
3. Play the song while reading an article or a book.
4. Start to hum along with your playing.
5. Sing the song and play the chords once every beat.
6. Try to keep an easy strumming pattern until you're comfortable with it while singing.
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