Re: hello from michigan
Welcome to the forum. The 700c wheels may be a weak point. Giant makes great bikes, but I recommend a used, steel framed beach cruiser or mountain bike for a first build. The kit is designed for those bikes, so you can spend more time riding or customizing and less time troubleshooting problems. You can transfer the motor kit to a cooler bike later, after you have gained experience and street cred.
“You're only young once, but you can be immature as long as you like" -Unknown