First off, it is never too late to study the craft of Acting. Whenever you watch TV, a movie on the big screen, or a Broadway/Regional play you will notice all ages and all types. Not all of these actors began as children or even in their 20's. I know many performers that started late in the game (some series regulars) and you can too--if you put in the work.
And I can help you there: with scene study and character exploration, text analysis, finding emotional flow; and also with Show-biz stuff: headshots, auditioning, how/when to get an agent, etc. The first thing to do is to build the product before you try and sell it, or at least know what you are selling.
Bruce, that simply means you have to commit to the Craft first before you "try to be professional," and get paid to perform as a SAG-AFTRA and/or AEA actor.
So keep your job while you open this new chapter of your life and enjoy the journey of honing a craft. If you do this and trust the Universe, being older may even give you an advantage depending on the timing of the market, as you will have less pressure on yourself financially, bring rich, life experiences to your characters/auditions, as well as a different perspective/approach to this business.