then..You should be able to get a deep socket on the bleed screws no problem to crack them open. A tap with a hammer should shock it off nicely. I would also invest in the proper "crow foot" type spanners for brake bleed nipples. You will not round them off then as even a ring spanner can round them quite easily.
it really couldnt be easier.Crack off flexi hose but don't undo it, just a tiny crack.
Remove caliper bolts
Spin caliper off flexi hose
Spin new caliper on to flexi hose
If that loses more than 10ml of brake fluid then you're slow.