I got an offer for a half head of foils for $50 from a local Aveda salon (half head meaning through the top and front, not that they would literally only do it on one half of my head). I think it would be kind of fun, especially since I'm growing my hair out and am getting a little bored. I have never colored it before though, except with henna. I am not even sure what I would ask for. Any suggestions? I'm not too well versed about colors or about the type of highlights (thick and streaky, thin and subtle, etc).

Or should I just stick with what I have?

This is done by a student under the strict supervision of an instructor, so I'm not sure that it's the kind of situation where I can ask for input or not.