It translates to I make fun of myself, meaning that you tease yourself. I humor myself is more saying that you make yourself laugh.
The verb "to humor" in English has very little to do with the noun "humor" for some reason. To humor someone is to do or allow something that you believe doesn't need to be done/allowed (especially either as a precaution or to learn or demonstrate something), in order to satisfy person who thinks it does need to be done/allowed. A couple examples:
There is a bug in the software, and Bob thinks the problem might be X, and Alice knows that X isn't the problem, but she checks for X anyway. Alice humors Bob by checking, just to make sure/demonstrate to Bob that X is not the problem.
Eight-year-old Jane is confident in her bike riding abilities, so she doesn't think she needs to wear a helmet. But her mother is worried about her, so she wears a helmet anyway, to put her mother at ease. Jane humors her mother in this way.
Nothing to do with humor.