+1 to what @RLGL says. You need to start slow and adjust your expectations. I’ve been using V-Ray for a few years now and probably can’t get that good of renders. Start by taking our free full-length course on SketchUp Campus. I know it’s for exteriors but it covers materials, lighting, and render settings which have a lot in common with Interiors (I’m working on a V-Ray for Interiors course as we speak!).
After you complete that course, try posting here again but with specific questions or issues so we can better help resolve. See this thread where someone was having trouble with realism and several of us on the forum helped them and their result looked much better afterwards.
Also, and don’t take this the wrong way, but really think about your design first before worrying too much about V-Ray settings. Specifically, you have quite a few really bold and contrasting colors and materials. Unless it’s someone else’s design and you’re just rendering it, there’s no amount of rendering knowledge that’ll will make that feel like an inviting space to want to be in.