New PC User in Need of Guidance

Hey everyone, I am new to the PC world (3 days in) and am coming from gaming on PS5, Xbox Series X and computing on Mac. I searched a bit and my questions aren't really answered but I am sure I might not be asking it properly. I am hoping the community would help me out. First the tech stuff:

Hardware

AMD 7950X3D MSI 4090 64GB DDR5 6000mhz 2 M.2 drives (1TB where OS is and 4TB games Sony 55"A90J (TV)

Games/Software

Microsoft Flight Simulator, Helldivers 2, Cyberpunk 2077, Call of Duty (sometimes) Starfield and Lightroom/Photoshop.

I am tweaking things and doing my best to understand what I am doing but I am a bit confused. Questions:

1. I have VRR enabled on my TV and am getting 120hz and resolution is set to 3840x2160 should I enable G-Sync in the Nvidia Control Panel? 2. Should I be enabling V-Sync for any reason at all for any of my games? 3. Anti-Aliasing is really confusing me? Is TAA the way to go or should I or the Nvidia DLSS 4. DLAA Super Resolution Mode is an option and I am really confused if I should enable it or not.

I am sure there are other questions I have but this is all I can think of. I understand that here isn't a one size fits all however I would really appreciate your grace here since I am really new to being able to customize everything so granularly and Windows/PC gaming in general. If there are any questions or if I missed any details, let me know. Thank you!