Doing a solo motorcycle road trip across Canada is freaking spectacular.
The suggestion that you do a smaller multi-day camping trip or two is spot-on. Get used to packing on the bike, figure out what you need to weark, how often you need to do to stretch your legs, your back, your shoulders, find your comfortable time between breaks. Cover your bases; get CAA Plus (so they'll flatbed the bike if something happens), have some spare cash in case of emergency, that sort of thing.
If you're riding through Canada, assume you'll need to camp out a couple times; sparse, fully booked lodging and finding yourself "out there" on a bike running on fumes are strong possibilities, and can really add to the adventure if you're unprepared.
As Lightcycle implies, many of us can offer plenty of other advice too.
The utter selfishness of riding solo; if you want to read a book, stop and read a book; daydreams about riding distracting you from reading, get riding; don't feel like riding much today, do something else; feel great and enjoying riding for 16 hours straight, keep riding; hungry?, stop; tired?, rest; and so on. Do that for a few weeks in unfamiliar territories, the feeling of awesome potential and things to learn, and those little stresses back at home or work start to fade into the background.
You always remember your first time.