Since I changed career paths, went to cooking school and am now working in a restaurant, people will invariably tell me "OH MY GOD! I have told my friends/wife/husband/partner/family so many times that I would love to just chuck it all and go to cooking school!"
A few thoughts on this:
1) Have a stretch goal in mind. "Going to cooking school" in and of itself will get you two plus years down the road. You may thoroughly enjoy the experience, but it would help if you had another, more specific goal in mind, such as "and then I want nothing more than to work in a white tablecloth restaurant" or "and then I would like to be a research cook and work at a flavorings company". For the sake of clarity, let me restate: Cooking school in the U.S. will only get you two years (4-8 if you slack hard enough) down the road. Know why you would be doing this and what it would add up to.
2) Trail (or "stage") in at least two restaurants (if not more). If you have never worked in a restaurant kitchen, then please absorb this: NOT SEXY. I don't mean the work isn't fulfilling or that you won't learn all sorts of stuff. I don't mean you won't work with some really interesting folks who care about the same stuff you do and who will influence you. I don't mean that you won't share ideas like genetic material, as your chef passes on to you what he or she learned from the chef who worked for the chef who -- you get the idea.
What I do mean is that, especially for the beginning cook, you may make pastry cream over a very hot double-boiler, every day or so, receiving a massive steam bath, sweating like a sumo wrestler all the while. In addition to your station (mine is garde manger or pantry as it also called, which is the typical starting position in a kitchen) you may make fresh bread, hundreds of rolls and numerous loaves...every day, or that you may have to do any other number of tasks...repetitively.
All the better that you trail first, so that if this be madness, you can quickly get it out of your head. Or you may find that you wish you had done it a lot earlier, as I did. Find out first by approaching a chef you respect (and/or may be a patron of). Tell them that you would love to trail (or, again, "stage", for you francophiles). You will be pleasantly surprised to find that many or most of them will be quite happy to allow you to trail. Take advantage of this. Whether you ever decide to go to cooking school and beyond or not, it may well be a peak experience and will change the way you see restaurants. When you trail, the chef, the sous or perhaps even the whole kitchen will toss you tidbits to taste. They will explain things to you (such as the difference between Grades A and B foie gras). You may get quizzed ("Do you know why I am doing this?") You may very well prepare dishes that paying customers will eat. Drink deeply of this experience. If it leaves your stomach upset, it is wrong for you. If you find it intoxicating, you may have found your home.