No it isn't a real SATS test, but it is done to give an indication of levels.
Can't say the Art I teach is easy, it is bloody hard and academeic, deliberately so to stop the time wasters picking it for GCSE...and they don't choose it because of this, so very few wasters in our dept!
Well, a bit, just to get a grounding, but Art is very open ended and personal, so once they'd covered all the basics, they should be able to do what they want.
But if he likes working with design and computers, he may like doing DT Graphic Products which uses these programmes a lot. He could upload and manipulate photos in that, but again, it is also part of Art as well. Also Art covers other stuff like printing, or textiles,or 3D.
My pet bores in Art are painting and sculpture, but I managed.
Also, everyone can be taught to draw, and reach a good standard, just like any subject like English or Maths, It's how it's taught that counts.I bet he isn't crap, he sounds interested if he likes fiddling around with stuff.