The key to singing a cappella is being able to hold a tune without the help of instruments. To improve your pitch, try singing along to songs that you know well, and use a pitch pipe or tuning app to help you find the correct pitches.
Good breath control is essential for singing a cappella, as it allows you to sustain notes and control your volume. To improve your breath control, try exhaling slowly while singing a sustained note and make sure you are taking deep breaths from your diaphragm.
A wider vocal range will give you more flexibility when singing a cappella. To improve your range, try practicing vocal exercises such as scales and arpeggios, and work on singing different styles of music to challenge yourself.Learn to blend with other voices: A cappella singing often involves blending with other voices, so it's important to listen to the other singers and match your pitch and tone to theirs. To practice blending, try singing rounds or harmonies with friends or in a choir.
Above all, the most important thing is to enjoy the experience of singing a cappella. Don't be afraid to make mistakes and have fun experimenting with different styles and harmonies.
I hope these tips are helpful! With practice and patience, you'll be singing a cappella in no time.