Technically, what kind of music is more difficult to play on a guitar, Country, Rock, Bluegrass,?
Bluegrass musicians at Guitars general use and Country / Rock tends to use both electric / acoustic guitars, depending on the song and artist.
As a whole, and I hate to generalize, but I’d say the country is easy, but with the best artists in the industry. Bluegrass is generally more technical, but has a smaller range. rock guitar can be easier or more difficult, because the range of expression is different – the country could make the same range Rock, but usually not – prefer to let the steel pedal do the work, sometimes lead. So I think that each style is more difficult in a way, but bluegrass is probably the hardest hit from the beginning.
How to play Acoustic Bluegrass guitar easy beginner lesson