Never too late for a change as most here have stated.
I was well on my way to becoming a commercial pilot when I was faced with a similar decision. Long story short, a good friend was nearly killed due to fudged maintenance, made me seriously reconsider my chosen path.
I was mid-twenties at the time, took accelerated MCSE and Oracle DBA certifications, and never looked back. The DBA stuff really opened a lot of doors as they tend to be hard to find, and extremely expensive if you do. The only regret I have is not "knowing" after high school, as I likely would have pursued a Bachelor's/Master's degree in Computer Science, which tends to be helpful when looking to land the Director/Officer positions.
10+ years in, and I love my job.
Your interest in Network/UC certification is probably not something you will ever regret. There seems to be a constant demand for good people with these certs. The Cisco UC stuff in a great area to specialize. A generalist Cisco cert would be a good place to start, to see how you like it. The only Cisco cert I have is (CDUDC) Cisco Data Center Unified Computing Design Specialist, which is definitely more Systems or Infrastructure, not Networking.
Feel free to PM if you have any specific questions, or when/if you are looking for that first job.
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