You can probably do it yourself, however, you can probably make a right mess of it too... A lot depends on whether you're the kind of person who's good at manipulating small fragile and difficult things. I'm heavy-handed, so I generally get my stuff professionally serviced - it's quicker and easier.
It might help if you can post a good close-up image of the problem, or describe it more accurately.
Shutters do get stuck, and generally they can be freed up, but it's fiddly and re-lubing the inside of the camera can be very tricky indeed.
My guess is that if you do it yourself, it may well end up worse than when you started.
Rob