Good for you, V-Rod! This is my post #420, and it goes out to you, my friend!
(I may never post again--having the "420" looks cool.)
I strongly agree with lwien's suggestions. I'll also strongly reiterate his point about starting slow. You may be tough mentally, but respect your body and build a strong base before moving on to more advanced stuff. Don't let your mind trick you. Building a strong aerobic and muscle base takes patience, but you'll last a lot longer, just as lwien has. You've got the right idea--start with a brisk walk, or perhaps start swimming if you're able? Swimming is simply the best exercise, in my view, and awesome to do while vaked (but be safe and swim in a pool with others around if you're vaked).
As for a good website, I got turned on to
Monkey Bar Gym and really dig where Jon Hinds is coming from. Specifically, I got turned on to Eischens Yoga, which has done wonders for my body. I encourage you to check it out.
And for motivation - I suggest entering a 5k race, and telling lots of people you know that you've entered it. Those races are a dime a dozen these days, and the distance is accessible, assuming your past injuries will allow you to train/participate. This will give you something to look forward to and people to be accountable to. As lwien stated, avoid running on cement--look for trails, a high-school track, or asphalt, or something along those lines. START SLOW and be patient with yourself, while also pushing yourself.
Cheer
Pete Jones - sub-2:40 is fucking badass, my man! Also, my mother-in-law has Crohn's, so I have some idea of what you go through from knowing her experiences. All the best to you!
You're welcome, V-Rod! I'm happy you found it helpful and I hope you keep us updated on your progress.