Sadly, the vaccines so far available for covid are not 100% effective at preventing repeat infections. But odds are high that after vaccination, the severity of infection will be milder, perhaps far milder. Further, I do not know whether there is good information on this, but I suspect that the chance of serious long covid symptoms persisting will be reduced a lot by keeping current with vaccination.
I will be getting the new Omicron vaccine as soon as I can get it.