Try one that starts with C, moves to F, then G and then back to C. This is the most basic progression, and uses the major chords you know. If you start with an A minor before going to C you can make a more interesting progression which incorporates both major and minor chords. Generally speaking, you want to focus on the chord with the same name as the key (the root), which in this case is C. Think of the other chords as either springing from it or leading back to it. Play around with the chords and see what you can come up with!
It shouldn’t be a surprise that students learn faster when taking private guitar lessons or classes, compared to watching video tutorials or YouTube videos. Finding a specialized teacher - whether in-home, studio, or online classes - for one-on-one guitar tutoring will give you the feedback and personal attention you need to become the best guitar player you can be!