To write a guitar song you can start with the lyrics first followed by the guitar or vice-versa. If you want to write the lyrics first, simply pick a topic and start writing your song. Choose a topic you are passionate about because the words will likely come to you more easily. In the first stage, don’t worry about how the words sound. Instead, just write your ideas.
Writing the music for your guitar song begins with picking a key. The most popular keys are G, D and C, but your music could be done in another key.
If you find it difficult to play the guitar and sing at the same time, let someone sing the song while you play the guitar. With practice, you will be able to do the two together. Conversely, you can record the guitar and listen to it with headphones on while you sing and record the vocals, which can be layered to create the completed song.