I agree with Barry. Dry suits are very expensive, especially the Kokatats now that the Canadian dollar is weak against the US.
Start with the wet suit unless you’re planning to become a high performance paddler from the get-go and anticipate spending a great deal of time submerged practicing your skills.
While I do have a dry suit, I actually mostly wear a two-piece neoprene suit (rather that a farmer Jane). At very reasonable prices MEC sells pants in various lengths from shorts to capri-lenght to long, and vests to wear on top. I just find that more comfortable. I wear a goretex paddling jacket with layers under as rain gear or for warmth unless I’m winter paddling.