Shame you didn't post this before the weekend just gone as there was a big get together at Stoney this weekend and all your questions would have been answered.
Looking at your location, touch base with Rich Walker (GUE Instructor and Halcyon dealer) or NeilH (organises DIR try-dives for the midlands/north!!) on here about meeting up, trying some kit out and setting it up properly.
Timescales wise, I think you have enough under your belt to get a wing and harness for a single cylinder.
For more information on kit have a look at
Peter Steinhoff's site,
Clare's Site and
Andy Kerslakes site.
HTH