I want to write a song, but I don't know where to start and I don't know what kind of chords will sound good :>
Hi,The Circle of fifths is your friend: https://learnplayuke.com/circle-of-fifth/
hope this helps
If you want to start easy, just use C, Am, F, and G or G7. There are lots of completely different songs that use just those chords. Have fun making your song!