Where can I find social media icons with a "free for commercial use" license for my AE Proyect?

Hi! I’m working on my first Envato proyect, for Videohive. It’s about an After Effect proyect with a social media icons animation, and I have a doubt.

I know it’s a novice question, but can I just download any icon from google or sites like seeklogo.com and then animate it? Or do I have to do a specific search for free for commercial use ones? Or even create them from scratch?

Is there any website with these “official resources”?

Thanks !!