I am sure you can sing. You can play the melody notes of your song, but you will be playing one note at a time. That won’t be good enough to accompany you when you sing your favourite songs. You want to hear some harmony.
When you invite your family and friends over, think of the fun you all would have if you could accompany them as they sing along.
You can learn to play chords on piano using left and right hands at the same time. The songs will sound fuller and more complete.
Learning to play chords is not very hard. You learn to strike two notes at a time and after you master that, gradually add more and more. You will be so proud of your playing !