Pushing your stamina/endurance might cost you weeks or even months due to injury, but if you take a break for a while maybe you just cost a day or two,but you can keep on training for following weeks and months.
That's a good point. You would think it'd be obvious, but if it were, I wouldn't have been asking. Thanks for bringing this up.
As for the first part, many of you have said you just step on the mat and leave the world behind... or something to that extent. Well, I wish it were so easy. If anyone can break down into simplier steps on just how one can do THAT... it would be apprechiated. My "world" seems to haunt me wherever I go.