RE: 107' Sukhoi for beginner??
That plane is gonna grow with you all the way if you want it to. As was already mentioned, most people start out on a 50cc plane then go up, but with the bipe skills you already have you should be fine with it. Sukhoi's are very much underrated for precision work. Once properly setup they will compete easily with any Extra, Edge, or Yak out there.
As was already mentioned, do not slack on any of the equipment for safety reasons. Try to get someone that already does IMAC to coach you. That person can be a wealth of knowledge in how to do the sequences let alone getting the plane setup properly. Proper plane setup is key as it takes a load of work off the pilot. Dig up a copy of Peter Goldsmiths trimming article and follow it. In most cases you can ignore the parts that describe incidence changes but follow everything else in order. This will take roughly 20 to 50 flights depending on how well the plane is built, beyond what you assemble. If it was jig built and the covering was done with a reasonable amount of care as to not induce a warp somewhere then you'll have a good starting point.
I have trimmed many IMAC planes over the years and I have not seen a single one that did not need something like engine thrust angle changes, some form of radio mixing on the down lines, CG changes, things like that. Once all the trim work is done, you'll be quite amazed at the difference you will have.