Are you thinking of changing them yourself or hiring a locksmith?
Congrats on the new home — that's such a huge win, especially after a long search! You're definitely thinking the right way. It's super common (and honestly really smart) to replace or rekey the locks right after buying a house — a lot of people do it within the first week or even the first day. You just never know who might still have a copy of the old keys (previous owners, contractors, cleaners, neighbors, etc.). Even if you trust the seller, it's more about peace of mind. Some people rekey (which is cheaper — it changes the internal pins but keeps the same hardware) and others swap the locks entirely, especially if they want to upgrade security at the same time (like to smart locks or high-security deadbolts).