Hey Viv!
Don't feel pressured to fill a certain role in the family - play something you want to play! If you do want to play a mage, that's okay... It will certainly allow you to RP in certain threads and certain ideas, however, your character will fast become Wanted within Connlaoth and will be faced with being hunted, possible deportation to the camps, etc. It all makes for good drama, but those themes can be very heavy and hard to play out!
Plus, I reserved the last Treyburn to use for plot purposes, so we will definitely have a mage if you choose not to play one! If you do choose to play a mage, that is completely fine too! And that other Treyburn character can be used in plots and schemes!