New to building

My older cousin bought some parts a couple years ago theyre still brand new in the packaging. He gave me the rest of the list to finish off just wondering if these are good or if i should switch some up. I wanna be able to play games like r6 as well as do some other administration work on the side

I have: Corsair RM550x MSI B450 Tomahawk max G.Skills ripsjaws DDR4 16 gbs Hyper 212 rgb black edition cpu fan Corsair 275r Airflow

Listed parts: AMD Ryzen 5 3600 Samsung 970 evo 1TB SSD MSI gaming x geforce 1660ti 6gb

Budget for the rest for parts are 600-1000 CAD