I used Youtube for guides on placing the CPU chip with stock cooler on top, placing motherboard in the case and cable management. The motherboard manual I had was also helpful as the diagrams were clear.

My CPU: AMD Ryzen 3700X

Motherboard: ASUS TUF Gaming X570-Plus WIFI

Graphics Card: ZOTAC Gaming GEForce 1660 Super 6GB DDR6 (Did not need the best graphics card as I just play Starcraft Remastered for gaming.)

Having a fully modular power supply is nice as you do not have to use everything. Use the cables that you need and leave the excess in the box.