Welcome and congrats on the bike! I think it really depends on 2 things: 1) what's your fitness like now? Have you been doing other active stuff? 2) How comfortable do you want to be when you finish the ride? For someone who is already active, I think you can pretty comfortably work up to that. For someone who has been less active - you may be able to do it - but maybe not as comfortably.

Also what's the terrain like on the ride?

CA