Gaming PC?

I looked for these parts and wanted to ask if it is compatible because this is a very cheap PC, of course I will upgrade it later and so but Minecraft and gta can be played very well on it!

So an integrated graphics unit is not the big craze for gaming right now. In addition, new Ryzens will be out soon and it's worth the wait, especially for gaming. Find a dedicated graphics card.

So far it fits. What are the specifications of the RAM? DDR4 3200 CL16 would be just fine. Otherwise DDR 3000MHz CL16 is sufficient. It shouldn't be less.
You can take the mainboard and SSD, please don't buy the power supply, it's very cheap! Better buy this here:

https://hardwarerat.de/...er=SW10571

In general, the system can be built like this, but if I were you I would prefer to use an R5 3400G and then use a little less SSD storage! Memory can be retrofitted very easily

You don't need 550 watts for an Apu system, unless you want to upgrade soon
I would recommend the Msi B450 M Pro VDH to you
Should you take 16GB RAM, the min. 3000 Mghz is fast
If you don't need 1TB of storage, get a 512GB SSD and put the rest of the money into a graphics card

PS: If you could tell me how much budget you have, I suggest you a replacement configuration.

Yes, but the 1 tb ssd has been reduced from 136 euro to 36 euro

And my budget is around 400 euro

Where should this SSD be put down?

I would advise you to save 100 euro and then configure a PC with an Rx 580 for you