I've lost chunks of time repeatedly owing to injuries and other health problems, and coming back is hard. You said, "bikes", so what else do you have besides the Masi? When I am starting from almost zero, I prefer to start with one of my less sporty bikes - it helps keep my expectations low and helps me enjoy the ride without worrying about distance and speed. I don't have any comfort bikes and I wouldn't suggest that you go that far - in my case it's an old MTB or a touring bike. It doesn't take long for me to move back to the faster road bikes, and I enjoy the progression.