Hi gstacho28,

For the Dead, rhythm isn’t just strumming — it’s groove and feel.

On the site, look for

Strumming pattern lessons (especially syncopation)

Lessons on groove and timing

CAGED system rhythm applications

Playing along with backing tracks

Instead of random lessons, search specifically for

“Rhythm guitar fundamentals”

“Strumming geometry dash lite dynamics”

“Playing in the pocket” 

You don’t necessarily need a full beginner course again, targeted lessons will probably help more.