Oops, you've got a "small" PC to work properly with DAZ.
First, you should know that with Iray, daz loads the scene into the VRAM of your graphics card. If this scene exceeds your current 2GB, DAZ will not use your graphics card for the rendering, but the processor, which will make it go much slower and you will notice that your PC seems to be frozen ... this is what happens to you with the figures genesis 8.
Having a powerful graphic and, especially, with lot of VRAM memory, is crucial for DAZ. I recommend you to start, at least, one that has 6GB (the 1060 or some of the new RTX), its price is "economic", and to be completely relaxed, the 1080/2080 Ti with its power and its 11GB are a pleasure, although they are expensive ... maybe you can find some offer of 1080Ti.
Another problem you're going to have is RAM memory. DAZ also loads the scene there, so 4GB is not much and surely in scenes with "heavy" scenarios or with several characters will end up giving you error and closing.
8GB is the minimum, 16GB the recommended, and 32GB the great.
The processor isn't that important, but yours is really old and you may find it hard to work with DAZ smoothly (although it won't affect the rendering).
Yeah, rendering with DAZ isn't cheap
Although, don't despair, I think that in the forum there is a thread that talks about how to render with a less powerful PC, you can look there and see what people say.
If you can't afford to expand (well, changing would be the most appropriate word) your PC in the short term, you can try to make a game with Honey Select or some other program that doesn't require as much power.