In my experience, there are relatively few VNs that won't play on the computer described above. However, there are some companies and engines your computer might have trouble with.
Giga's VNs made after 2012, including Baldr Sky Zero, will probably have trouble on your system, to varying degrees. If you absolutely HAVE to play them, take down all programs unrelated to the game. Instead of using a walkthrough from a browser, turn it into a pic file like a bitmap or a jpeg that can be viewed without using editing software. The big one will be Baldr Sky Zero though... even my gaming desktop that can handle the Skyrim Special Edition at Ultra at 60 fps will sometimes fall apart on that game because of the bugs in its design. This is a solution for when you start having trouble.
Anything made by Minori. Minori's games' animation (primarily in more recent games) eats up a lot more RAM and CPU than it should, considering the results. I'd suggest turning off the animation if you play one of their games and start having trouble.
Anything based on the Kirkiri engine will be playable. Some gameplay VNs made after 2014 might be chancy.
VNs don't generally have high-spec requirements. The only real problem I see with your specs is the CPU... and even that shouldn't be a problem as long as you don't keep a whole bunch of windows and applications open at once. Internet browsers, torrent clients, the Steam client, etc... you should take all these down if you are having trouble.
If you still have problems with games that fall well-within your computer's specs, then you should probably think about doing a full format and restore on your computer's hard drive, because you've probably got bloat programs running in the background that you don't know about... not to mention potential malware. If you are using a store-bought computer that came to you as-is, then it is almost inevitable that the company that put it together will have put proprietary crap that has no practical use for you but eats up resources on your computer. Windows 10 computers are particularly bad about this, because microsoft includes a lot of absolutely worthless software that you will never, ever use... such as internet explorer and Cortana. lol