Looking to buy my first car

Hey guys. I’m in the progress of looking for cars, I’ve decided on the is350 fsport 2025. I’m looking to lease and buy out after the 3yrs. Any tips for me when going into the dealer? How can I bring the price down if decide to finance the car instead. My first car was a 2012 Honda civic that I got as a gift for my HS graduation but now I have a big boy job and want to kind of splurge a little. Any and all advice would be greatly appreciated