You can get hired at your age. At my first 121 job I turned 19 in GS. I know of a couple of carriers like xjt, qx, etc that you can get on with. I'd defnately keep in mind that there is no stability at all no matter what somebody says with very few exceptions. Make sure you've got a plan B in place and don't ever let anybody stear you away from the most important thing - your family!