I suck at rolling. For me its impossible. So im just gonna take the pain. Any workout to get me ready for the shock to come?

ive been working at it for like 2 months now everyday until yesterday when i messed up my heel really badly 

Sorry, but you NEED to learn how to roll.

Also, you can drill landings from level ground vertical leaps and then try to land as quietly as possible. This is also important, but if you want to be doing this when you are older you NEED to learn how to roll. No way around it.

Two months is hardly a long time. Do you have any Aikido/Tae Kwon Do places nearby or know anyone personally involved in martial arts? Most martial artists will know how to roll and can teach you.

Well, sorry to be blunt, but you're simply not going to "take the pain."  You'll either learn to roll, or you'll quit parkour.

I'm not saying that as in I'm going to track you down and make you learn, but it's a simple fact that if you're actually taking parkour seriously you will eventually practice the roll to where you have learned it, or you'll simply quit parkour.  Honestly, it really IS that essential, and every true traceur will and has learned the roll.  It's not really an optional part of parkour, to be truly honest.

Ground level. Work your way up. Else injuries happen. Plain and simple. Good day.

That's why you don't practice the roll by jumping off of things.  You start out standing on the ground (or even kneeling) and practice the movement on soft grass or mulch or a mat or something.  Watch the tutorials and really analyze what they're doing.  Try to imitate exactly how they do it.

After every single roll you do, analyze what you did, how it felt, and what adjustments you could possibly do to fix any problems.  And do it again....again....again...again...again.

Repetition is the key.  You will literally do the roll hundreds of times before you actually get it down.  Practice practice practice...that's the ONLY way.  If you're inclined against repetition, well, then....you read my first post.

If this is truly how you feel then you will heed our advice and not go near heights until your body is ready. If you want this statement to be true...you will sit out there and roll on the grass thousands upon thousands of times until one day it might just hit you smack upside the face and you realize how to roll.