Kilabeez has a point. To become a qualified Engineer (in it's various forms from licensed to Chartered) takes years and a lot of work - probably more than an ATPL does, although a lot less money.
If you are bright, practical but not academic, then going for Licensed engineer is not a bad idea, but aiming to be an Engineer because you don't think you're bright enough to become a pilot could rebound on you quite badly.
G