As someone who if I recall is finding this whole thing difficult, I find it strange that you would be so concerned about the incredibly small risk of side effects from this. Whatever that risk is it is going to be a far less risk than getting Covid....at any age.
Sometimes due to previous experience and developments science is able to increase its pace significantly in all kinds of fields including medicine. Given the right circumstances often war or catastrophe and the right financial backing things can happen very quickly indeed. In this case much of what has gone one has been able to be accelerated as it is something that has been done many times before..ie create a vaccine only this one is for a new illness.
This jab will offer you and everyone else a way out of this nightmare. It is infact the only way out, always has been always will be, track and trace and testing are like using Whitleys and Wellingtons to bomb Berlin in World war two, by and large a complete waste of time, only when the Lancaster came along were we fit for the job.
This time its not Lancasters and Spitfires getting us out of the shit, its syringes and needles, I would strongly suggest you consider very carefully having one as soon as you are offered the chance.