For example, if I wanted to stream Minecraft / have streamed the stream was always rukler which PC is optional for streaming and in a 700-1200 euro price range?
You would have to configure it yourself, so always different where you buy the things since you play Minecraft and the game does not need a good graphics card, it is easy to build one if you don't know how to build one, watch YouTube videos or search any website that selects the parts and assemble
Ryzen 5 3600
GTX 1660 great
Samsung Evo 1TB Ssd 860
(I don't know anything about mainboards)
500Watt power supply
The best thing is to get an amd processor because it has a better multi MHz that is very good for streaming. Also, 16gb RAM, if you feel like it, go to 32 RAM 3060 ti they have enough power and fit your price limit, housing is your own choice, power supply 600-700 watts A 1000Gb Ssd or 500 GB an Ssd with 250Gb should be enough and preferably a good CPU cooler because the box cooler from AMD is not the best
And a mainboard from b450 to 550 but wait until March because the prices are currently high