I'm 54 & a Blow Job Virgin

Dear Dr. Betty,
I'm 54 and a blowjob virgin.
I've tried twice-gagged the first time and the second time was ok but it really makes me uncomfortable and i know my new b/f really likes it; I dont know how to tell him i don't know how to do it. I've seen a couple of your youtube videos, but since we haven't even had regular sex yet after 4 months due to a back injury of his, I don't feel quite ready to attempt an inexperienced BJ and be embarassed etc. he does his best to pleasure me and i him but i want the true lovemaking experience first.