Also its up to you if you want to participate in entering or not, but Im sure someone would love to get arm from you! Nobody bites. ^w^
All you'd get in return is a thank you and improvement on your art.
Heck one of my best friends is trying to learn to draw. She hasn't even gone a month of doing so yet but I see shes trying and I applaud her.
You can learn a lot from threads like these too! Also the Secret Santa would be fair as humanly possible so dont worry about skill. You can also think about this if you still have doubts. All those artists you think are "great" had to go through the same stage you were or are currently in. And that could be anything.
Traditional art can be beautiful. Its okay to draw traditionally. While most would prefer digital, people would respect the fact that you tried hard for them on paper. And if you think your art would be a piece of scrap lying around, it wont. It wont because it was a special gift from you to them, a gift from their Secret Santa.