Hey Righty,
Well to start answering your question:
1) If you already have been flying Slimers than I believe the Firebird type planes will be below you. A lot of guys like flying them, but if you've already flown a balsa/ply plane, you will notice an EXTREME difference in flying styles of the planes. The Firebirds only use throttle managment to gain and loose altitude. You may be interested in something more like a Slowstick, Tigermoth, or any other great parkflyer trainers. [link=http://smoothair.ca/besttrainers/besttrainers.htm]Trainer List[/link]
2) You don't need an instructor for parkflyers, but if you've already gotten stick time, you'll be just fine. Electrics at a non-club sanctioned field (hence a park

) don't require minimum flying times, instructors, or someone breathing over your shoulder. Just make sure that you take your time, and make sure no one is around you. Also, for the first few flights DO NOT fly in the wind.
3)You'll have to check your local park ordinances, but in Winnipeg, I'm sure you won't have a problem flying at your local school ground or park.
4)Put the paper towel away, hold your breath, and fly brushless.
Geof.
www.smoothair.ca