Hi, you should check our Our Community Bikes on Main and 16th-ish. They are a bike coop and have fixed up bikes for sale. Also you can try their sister location the Pedal Depot on ontario and second ave which have some fixed up bikes for sale, but also many bikes in need of a bit of help. You can get help from the staff to fix up a bike. Since you found a sweet lugged road bike, both places are great to find second hand parts as needed. The staff are great and helpful. Great place to fix your bike. Jet Grrrl is a great mechanic, but hardly ever open.
Dream Cycle is nice to drool and they have great prices on brooks saddles. You know you want one. There is a nice new droolworthy shop Kissing Crows Cyclery. Might Riders has good stuff, but I have had bad experiences with them. I have bought bikes on craigslist-or tried buying bikes on craigslist. Not always a good idea if you do no know about bikes. Always hidden problems!
Do not be afraid of traffic. Vancouver has an awesome network of cycling routes, even though the cars seem fast and scary, they do know you are on the road. Pretty soon you will get used to it. Just be careful and follow the rules of the road(as much as possible, we have the advantage of shortcuts and being little and fast!). Also, you can choose to follow certain bike routes with less traffic. The scariest thing is bike theft so lock it down!
I have quite a few bikes and do not be surprised if you suddenly find you have a stable.