A procrastinator is someone who always waits to do things. "I really need to pay this bill, but I've been procrastinating."
"Recovering procrastinator" is a half-joke. It sounds like "recovering alcoholic." The speaker is saying procrastination is an illness that can be conquered, and that he is conquering it.
"Hold myself up" means "Be a model," "Be a good example." You hold something up so that a group can see it.
The writer is joking and saying "Look at me. I am showing myself to you. Not so that you can see a good example, but as a warning."