How do I upgrade this PC?

But it would be a shame to throw away the old one.

It is the HP Pavilion (570-p073ng) desktop PC (Intel Core i5-7400, 8 GB RAM, 1 TB HDD, 128 GB SSD, Intel HD graphics card 630
The question now is how can I upgrade this PC? It's from 2015 and you can see the component in the screenshot below.

The following problems are that it always freezes / has too little FPS when playing games like WOW or Minecraft, so I have absolutely no idea which component to refresh.

It would be nice if you write me which component I should buy new or which product I should buy directly would be even better, because I don't know anything about the older hardware anymore and it would be nice if I could try to get something out of it at least for light games so that I can give it away to my family (budget doesn't matter).

I will add a picture later, with the values of the PC itself, i.e. Which motherboard it has exactly and so on.

Thanks in advance and best regards.

You build in a power supply unit of at least 650W Gold and an RTX 2070. You already have a good PC.

If there's still money you buy 16GB RAM and install it.