If you're still asking in a month, drop me a PM - hopefully both of my shares in vintage, difficult to fly taildraggers will be up and running again (both down after, err, problematic annuals right now). I'd gladly swap a few hours for a go in the Luton.
Failing that, let's be honest - you're flying a microlight there - it's weight, drag, probably rather antique flying qualities, are all more microlight than modern aeroplane. The best training is almost certainly going to be in something like a Thruster TST (or better still, an Escapade if you can find a helpful owner, since it has heel-brakes - although not a castoring tailwheel - the nosewheel version is castoring, and quite easy to groundloop).
Try PMing Wyvern or Madambreakneck they both have a lot of experience successfully teaching people to fly such things.
G
N.B. If that's you in the photo, the problem may be that you need to use a few more cushions?