1. Gather your materials. You will need a clarinet, a reed, a ligature, and a mouthpiece.
2. Assemble your clarinet. Insert the reed into the mouthpiece and secure it with the ligature. Then, attach the mouthpiece to the barrel of the clarinet.
3. Position your fingers. Place your left hand fingers on the keys corresponding to the notes C, D, E, F, and G. Place your right hand fingers on the keys corresponding to the notes A, B, C#, and D#.
4. Play the song. Begin by playing the first note of the song, which is C. Then, follow the notes in the sheet music to play the rest of the song.
5. Practice regularly. The more you practice, the better you will become at playing Mamma Mia on the clarinet.
Here are some additional tips for playing Mamma Mia on the clarinet:
* Use a soft reed for a mellow sound or a hard reed for a brighter sound.
* Experiment with different fingerings to find the ones that produce the best sound.
* Practice playing the song at different tempos.
* Use a metronome to help you stay in time.
* If you are stuck, there are many online resources that can help you learn how to play Mamma Mia on the clarinet.