Is it imperative that you keep the 360?  Any 3-digit Optiplex now is not capable of running any decent games. The 990 MT is probably the only exception. After looking at your Amazon links and adding up the total ($869!) you can either build a nice modern PC with great graphics that will last you for a few years, or, if you wish to keep it as a Dell, you can get a 70/9010 MT or a 70/9020 MT with a power supply upgrade, max RAM, Solid State Drive, best processor, and a more modern video card (GTX-1660 or RX-580) and still have about $300 left over.  I used to have a GX260, which is even older, that lasted me for a dozen years and I would loved to keep it going, but the motherboard finally gave and it simply wasn't cost effective to fix it.
I changed the operating system many times and it still is very slow! It's running the way it's not supposed to be and it's only 30% good because of slow CPU, slow GPU, and needs more than 4gb ram. SPECS OF THE DELL OPTIPLEX 360 CPU: INTEL CELERON 440 RAM: 4GB. USED TO HAVE 2GB GPU: INTEL G33 INTEGRATED Needs replacements so it can run better and I discovered that it was laggy because I ran Roblox on it and it was very laggy and when I use older versions it only makes it work 5% better, did not fix it or made it better that much!
Optiplex 360, slow