I'd say go for it if it wasn't for the fact that the people working there are professionals and, unless you have some natrual nack for graphic design, your portfolio might give away your inexperience...like, look around at different graphic arts firm's websites, look@their portfolio's, & if you think you can match their work, go right ahead, that'd be awesome for you if it worked(do you have adobe photoshop?)
or a mac?..graphic artists are all mac-happy, they despise the PC