I don't think the vibration should be any problem. But, it may cause your neck to strain as you attempt to hold your head still. Anything that has caused me to strain/stiffen my neck has been a problem for me.

There is no answer to your second question. Every experience is different. Some will be very sensitive to things like jogging. Others will have no problem what so ever. I try to advise people to learn a soft foot plant so there is less impact. Try jogging with ear plugs in and alter your foot plant to lessen the sound resonating in your head.

I have a very soft foot plant so i have no problem jogging but a ride down a rough road is miserable.

btw, Nothing you said in the past bothers me. Besides, I forget everything too quickly. It has taken me years of repetition to gain the knowledge I have.