Just to somewhat summarize: to start in a mini-rally, raliette, or regular day ORRC event, you can use your daily vehicle with no more fears than going to work: if you're a crazy driver, you might do a crazy thing, on a rally just like in regular driving; but if you're a normal driver, there's no need or requirement to do anything extraordinary for the first few events at least.
You can come and test the waters equipped only with curiosity and sanity (but do read up a bit on navigation and rules unless you enjoy being lost for hours

); after you try a few regular rallies, meet some folks and decide to get serious about it, you can discuss some options and priorities with us. The overnight winter drivexes are definitely not for the unprepared (in terms of vehicle, skills & attitude), and most organizers won't allow inexperienced people anyway (I think Lanark, which is still on gravel, requires three TSDs under your belt; not sure how Ontario Winter Rally works).
FWD GTI is certainly no crazier of a vehicle than a RWD pickup truck, or a family minivan, for most TSDs. And Ontario Winter Rally, one of the more challenging winter drivexes, keeps being won by this pesky guy in a 1984 Toyota Tercel. Station Wagon....
So come on out and have some fun