I am completely against those that say it is hard.
In principle,you compare music notation to speaking and writing.
You use 20 to 30 or so letters in the alphabet,depending where you are fluent on,against 7 notes in the whole music vocabulary.
Combinations of of 26 letters (english) is 2*26 (billions),and while there are not that many words,you can learn tons of them by age 7.
With this concept think about the staff,is only 5 lines with couple extensions,a fretboard with 24 frets for 4 or 5 strings.
Add the intervals to the mix,and still not so hard.
Music is so easy to learn,a 5 years old can do it.
I could make numerous attempts to make it understandable,but,you only need to practice it,better hiring a teacher,and you'll see yourself reading music in months,not years.
Always read something new,your ear will train by how it sounds,you will remember particular styles this way.
You do not need to read at first sight,that is something for a future approach and for a very professional position.
See if you can do this : write down the songs you know,see if you can lay down your own style in paper,and in case you are playing those songs with a band,follow your own writing,you'll be finding things to correct along the way and learn from stuff you already know.
If other members in the band also read music,compare notes,see if you are misinterpreting something.
keep this in mind : written music is not the expression of music in itself,your own interpretation is,when you play it.
There are many things in music that cannot be written.