I've bought sets earlier in life. One of my biggest mistakes was buying into the Calphalon craze in the 80's. All that stuff (and $$$!) eventually went into recycling or the dumpster. I also gave up on the revolving door of buying a "quality" non-stick fry/saute pan every couple years and I own no non-stick any longer.
I'd agree with those here who advise getting just what you need. The only thing I know about your style of cooking is that it will differ from mine. Get the pans that will help
you out the most.
For myself, I've found that the best "bang for the buck" is to get quality commercial cookware like Vollrath from an online restaurant supply house. A couple of places that have worked well for me:
KaTom Restaurant SupplyWebrestaurantstoreIf it holds up in a commercial kitchen, there's no way in Hades you're going to damage it short of a ball peen hammer.
My choices by function:
Frying/saute - Lodge or Matfer black carbon steel. Sole exception here is a 14" Vollrath tri-ply stainless.
Sauce pans/stock pots: Vollrath tri-ply
Never buy a "cookie sheet/pan" (Walmart, Target). Save money and get better results with 1/4 and 1/2 size commercial sheet trays. I like/own/use Vollrath - YMMV.
Braising/roasting/baked pasta (e.g. lasagna, baked ziti, sausages, peppers and onions) - 1/4, 1/2 and full size stainless hotel pans.
Nobody tells you about these pans. IMHO they're one of the great "secrets" of the resto biz.
What's missing? Although I own some great CI ware, I now use it exclusively for baking, like cornbread or focaccia or Sicilian thick crust pizza. Why? Carbon steel is lighter and easier to work with, creates a superb crust on a steak and is no more difficult to clean/care for then CI. Not throwing shade at the CI aficionados in any way - you do you.
One underrated benefit of commercial sheet and hotel pans is everything is a standard size. Therefore it all stacks and stores wonderfully saving space in your kitchen.
So, you see, I have no strong opinions on this subject!