We need social distancing, testing and tracing and we need it now. If that doesn't happen, the virus will run wild like it is doing in Italy. The "herd immunity" theory isn't proven to work - it is a gamble - and people of our age, plus the sick and disabled, are collateral damage.
The editor of the Lancet and other eminent scientists have written to the government to beg them to act now, or many thousands will lose their parents and grandparents. I doubt they will listen.
Basically, the only hope if you're high risk is isolation. The Italians are having to do it and we should do it now. Going to large events, or even small ones, should be out of the question.