Weird way to ask a question, and my reply is really late but here.
A pretty wide desk so that you have space to move around, see that beautiful pc do it's job, and to add that nice aesthetic to wherever you'd like to put it, (Preferably RGB) Mouse, and Mousepad, RGB keyboard (mechanical if you want), 144hz monitor maybe 1440p but 60hz 1080p is completely fine, you could add a normal office chair for comfort (believe me if you go cheap your back will pay the price after a long gaming session), headset/or speakers whichever you prefer (surround sound is awesome), led lights on the back of your monitor or behind your desk, and that's about all you need.
*SIMPLIFIED BUDGET FRIENDLY VERSION*
L shaped desk, monitor of choice, keyboard/mouse, led lights, and that's it. You could even add a shelf and decorate it if that matters. (I doubt anybody will even read this answer but it's ok because I like talking about electronics)