Suggest you run the tires that come with the bike. After you gain a few months and/or about a thoudsand miles experience on the bike, you'll be better able to judge what size tires you want to run.
Our team weight is lower (a tad under 250 lbs) and have run 23mm tires for decades. In our 'advanced age' (mid-70s) we use 25mm Maxxis Re-Fuse (folding/kevlar bead) tires.
Good wear and darn good puncture resistance, even out here in cactus country.
Enjoy the ride TWOgether!
Rudy and Kay/zonatandem