Checkout my strumming course: Strumming 101
A simple rock/pop pattern used in millions of songs.
https://www.loom.com/share/74d537e25bb644d39bdbfa38bdad4eec?sid=100b08f9-e002-4a28-b6d6-e92af9fa677c
Practicing with these grooves is the BEST thing you can do to improve your strumming.
Slow
Mid
Fast
Slow
Mid