Answer:
I think it doesn't matter how good you are at Art, as long as you enjoy it and want to pursue it!
Step-by-step explanation:
Honestly, I believe it is so important for you to chose subjects YOU actually want to study and want to take the exam in. Like all subjects, Art takes a lot of hard work and practice (I can see this in your drawing). But I suppose talent does help (I can also see this in your drawing)!
Whatever you choose, good luck and just enjoy it :)
Hope this helps!