Hi pickles75
The DWP used to send out renewal forms up to a year before the award end date. If they followed that pattern - you would receive your form at the end of this year. However, since the pandemic's end, some people have received review forms up to eighteen months before the award end date. So it is possible that you could receive one any time in June this year.
Should you do the training now or leave it until nearer the time? I can't tell you what to do here. You have to do what feels right for you. Personally I would like to do the training long before I had to fill out the dreaded form.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems