Thinking of giving it a go!
how difficult is it to learn?
A guitar is easy to learn, unless you want to copy other people - then it's impossible.
If you want to strum songs, easiest to write them.
C-G-F over and over and over - every book has those chord shapes - and don't let ANYONE charge you money for those chords - because they will.
Hit them, bang them, get a cheap acoustic, or anything you can, and sing along to it, and do them in any order, until your fingers do them easily.
It is not hard, but books tell you upstrokes, shapes, boxes, and it is all bullshit until you can smash out those basic chords. I'm presuming you don't want to do classical, or jazz, or anything like that.
Make your own words up, and use your little finger as soon as you can. Just slam it down on a string, cos it's spare, and essentially, with your basic open chords - C - G - F - your little finger, anywhere that it can fit, is playing funky music - you would be surprised.
C - G - F, then Am, Dm
E - A - B
D
They are all hard when you start, but it's just a matter of listening, hitting the strings, and keeping on till the next chord, so just carry on. And listen, because if you like it, then it is good.
All those chord shapes are easy to find, but if you need any help I will either find a link, or more fun, figure out a way to put up on here.
Anyway, good luck, and write your own tunes, never copy, it's already been done.