You didn't say if your countertops were laminate, stone or tile so here are so ideas I hope will help
Hi there, here's a blogger who did it with instructions! https://www.uglyducklinghouse.com/i-painted-my-kitchen-countertops/
Diane of In My Own Style gives a comprehensive tutorial on painting counter tops. Shes the best https://inmyownstyle.com/kitchen-counter-transformation.html
You could put an epoxy on it. This company has good videos on how to use their epoxy.