Do you know how many people received a guitar for Christmas? I don’t know either, but, trust me, there are thousands.
A few tips:
Now is a great time to advertise your services
Offer a starter package of lessons. Some people don’t want to commit to an ongoing lesson schedule, but will sign up if the lessons end in a specified time frame. This way, they feel that they can get a proper start
Offer accessories with your lesson package: some picks, a tuner, a capo or method book to sweeten the deal
Schools are a great resource for finding students. Contact the music teacher(s) and let them know about you. These teachers are asked often about referrals to private teachers
Contact you local classical guitar society. Even if you don’t play or teach classical, many classical aficionados like to play other styles
I hope some of these ideas are useful.