PPA
Alot of times strumming takes practice and a good ear ... it will come in time ... last night, for example, a friend asked me to play Neon Moon by Brooks & Dunn ... I've never played it before and noticed the chords were simple ... the strumming was awkward at first but after about 5-10 minutes I was able to figure it out ...
Just try different songs with different strum patterns ... soon it will click with you
I learned my patterns from www.justinguitar.com
Electric: Gibson Les Paul Studio, Schecter Omen 6, PRS SE Custom
Acoustic: Fender Talman, Yamaha
Amp: Fender Super Champ XD/Line6 Spider III 75