K.P.
My parents heard the same thing about me as a baby... contacted an agent... got the head shots done... saw the price tag and stopped.
You have to be able to invest significant time into this career, and it is a career. You will be taking your child on auditions and have to start teaching him to deal with being rejected based solely on his looks at a very young age. Please keep that in mind.
If this is what you want to do, contact a local modeling agency and make an appointment. They will guide you in the process.