The key to being good at reggae lies more in musicality than in technique. So to make sure you really get the feel, it’s a good idea to just practice your strumming with all the strings muted. There are a few different styles of strumming in reggae. The most common one is when you do a single down strum on the second and fourth beat. This may be a little easier to conceptualize if you think of counting your beats “one AND two AND three AND…” If you count this way, the down strum would be on each “and.” This is probably the most common strumming pattern in the genre, and most easy reggae songs guitar players learn first use it.