PC for both streaming and gaming?

Hello, i recently wanted to get into streaming, not for the money but purely to share what im capable of when it comes to gaming.

Im looking at pcs however im not sure exactly what specs i should get, im pretty good when it comes to pc parts and how to install them however picking out perfect parts for both streaming and gaming in one pc confuses me, id also like this pc to last me a while as i dont wanna constantly pay for new upgrades.

Any recommendations?