I don't think your son is too young to try crying it out. I think it's a good idea, especially if he's slept the night on his own regularly in the past.
When I let my kids cry it out, I would check back on them gradually - 5 minutes, return to offer "I love you, you're ok" and a brief back rub (without picking them up), then 10 minutes, then 15... they usually didn't cry past the 15 minute mark. I consider quiet fussing to be not crying. If for some reason they cried past the 15 minute mark, then I would go in to hold them for a while and then start over. This didn't happen often, though. I am all for crying it out, but I think 30 minutes of hard crying is enough for a baby. I'm personally not comfortabl with letting a baby really, really cry for hours on end. Like I said, a hard cry with silence, then "talking", then fussing isn't what I consider "crying". But, it's your call.
It shouldn't take more than two or three nights. I like to plan crying it out for weekends so that if it's a rough night, it's easier to get a rest during the next day. Or, and this could work overnight too, I love folding laundry while I've waited for my kids to settle down to sleep. It's distracting, productive and the time it takes to fold a basket of laundry is just about the time it takes until he'll need you to come back in for reassurance :)
And if you're worried about your son waking up, we usually put the humidifier on in our son's room and it muffles the cries quiet nicely.
It shouldn't be hard at all. It's been the best thing, in my experience, and it gets everyone what they need - sleep. You can do it!