While there is a lot to be said for the stability that comes with tank age, 10 months is absolutely enough time if you're past most of the nuisance stages and have good coralline coverage and appropriate lighting, flow, and parameters already.
My concern is mainly the water changes. If you are doing a very large portion of your total tank volume every week (50% or more), then you may actually be able to keep required mineral levels high enough, but not if it's more regular water change amounts. This is especially tricky to nail because the frag will start small and probably not grow much for a couple of weeks, and then a year or more in the growth (and consumption) will be many times what it initially was.
The answer to this is testing and then dosing when things start running low. Start testing the main parameters now, learn about dosing and plan on a method (but you don't necessarily have to start) and once you have a baseline and a plan, try an easier frag.