Wow, congratulations. Nice haul. Looks like you got the discontinued Mauviel 250 with the SS handles. These are great–stay cooler than the bronze or iron.
I recommend you test the Baumalu linings for lead. Unfortunately, there are counterfeit Baumalu that make their way into discount stores which have lead-laced linings. Genuine Baumalu are fine, but test them.
As to what to make in your sautes, the world is your oyster! Since you got covers, you might try a Chicken Cacciatore to see how evenly all the pieces brown, the mirrepoix sweats, and the gravy thickens, and how fast things start and stop. And/or saute as many meatballs or (uncrowded) mushrooms to gauge how much more even the results and how much lower heat you need.
Just go easy with preheating until you learn to gauge that, and be thinking about picking the proper size pan for your portion/batch.
I’m excited for you. Enjoy!
Aloha,
Kaleo