I look forward to learning and exchanging experiences.

I need a solution to run conversion campaigns on Facebook and TikTok; could someone guide me on how to set up the pixel?

This is a detailed thing. You could try youtube. Thats better.

First install the Meta Pixel and TikTok Pixel on your website And verify they are firing correctly with their browser extensions, then configure the conversion events you want to track before launching your campaigns.
And any more confusion better is try youtube