Tip of the ice-cream - guitars?!
The difficulty of guitars depends on the song itself as well as the genre, personally I haven't played anything but metal, but punk is a good genre to start with if you're playing electric guitar like I am.
Guitars
Well, briefly, there are 3 main types:
Classical
Acoustic
Electric
I'm only learning electric so some things that I say may be specific on this type of guitar. Of course if the tuning is right, the sound will come out similar on all the guitar types but there will be differences on how the musics sound. A good example is my friend who's a bassist, because he plays the bass so often, he strums very hard and the sound that comes out when he plays his classical guitar is very "tight" so not only guitar type, the sound depends on the person as well.
Stratocasters are the most common types, my friend who teaches me and his friend who teaches him Mesa Boogie are the best, yet, most expensive amps out there ... I know nuts about technical stuffs....
For first timers, like me, 2 to 300 is a good price range to get ready your cash for a relatively good guitar
Skills:
- Rough draft on what you need to learn how to do
Alternate picking - up and down picking
Hammer ons
Pull Offs
Power Chords - takes some skill to keep your hands in the same position but move it around the frat board.
Practice: Some Click Five song but I use Second Hearbeat verse
Holding - The strings with the right intensity
Pinch Harmonics - Difficult! Holding is needed to achieve this
Palm mutes - A MUST learn.
Practice: Blinded in Chains pre-chorus
Controlling your amp - Volume and distortion people, volume and distortion...