@dermhye I think we have the perfect learning flow for you: Introduction to Game Asset Creation which focus on stack of rocks asset in the style of the picture you shared.
As Matthew said, the process is to sculpt a high-resolution version of the rocks, retopologize the sculpt into an optimal model, then bake the sculpt detail as a normal texture. We go over that workflow for exactly this kind of model in that learning flow.
Regarding your sword, it looks decent but also far away. Can you post a screenshot of the sword by itself zoomed in?
