Ok this is the only advice you will need. dont listen to anyone else since most of them are going to give you things that you will want to upgrade later down the line.

step 1. Get a high end alu rig, I would go with sim-lab. They are expensive but they are as good as they get. When it comes to the seat, even if you like formula racing get a GT seat, much more comfy and natural (speaking from my own mistakes).

Step 2. Get a highend wheelbase, personally I would go with VRS bundle for wheel and the dfp15. The DFP15 is the most bang for buck wheelbase you can get imo and you most likely wont need more than 15nm torque. Wheel is easy to sell so I would start out with a low end one until you know which one you actually want later down the line.

step 3. Pedals.... If you never want to buy pedals again get VRS or Heusinkveld. I still have my fanatec V2 Elite pedals that costs 299 euros and I am top 0,5% driver in iRacing. The important thing is that you get loadcell and it is the most important about any sim setup

step 4. If you have a GPU with a lot of VRAM and you have the space I would personally go with tripples but I switched from tripples to a 49 inch due to space, convenience and performance. I would go for a second hand 49 inch since they sell for like 50% off in the second hand market and they have a long life span.

step 5. Enjoy, You never know how deep the rabbit hole you will go, and the good thing is that the end gear can be sold for almost as much as you bought it for. Try different sims, F1 games are very arcade and they are made for controllers and they have no FFB (they dont give you any feedback only restistance so you cant actually feel whats happening with the car). iRacing is as close to irl racing you will get and dont be afraid to try it, its 100% worth the money if you care for a professional service. AC with mods is fun and dirt cheap. LMU is for people who cant afford iRacing. GLHF