OP. Sorry if this is a bit blunt - but you seem to have got all you want out of the RAF and clearly have no burning desire to join, or the backbone to take a decision on your own.
You could fail IOT.
You could fail basic flying training.
You could fail advanced flying training.
You could fail OCU.
You could get binned from your first operational sqn.
I wouldn't bet on just walking into a ground branch either as they started to get selective some years ago.
Go get yourself a civvy job, buy a house, mow your lawn. I don't think you would like detachment life. Or prove something.