It looks very UT99 and UT2k4-ish.
It would have looked good back in 1999-2005 era.
The thing is, using ue4’s bsp tools (even when converted to meshes) is a very outdated/unoptimal way to do things.
Try to get your hand on blender (or if you have money to throw around, 3dsmax/maya/modo/zbrush/etc) and learn how to model with that tool.
After you become better at one of the aforementioned tools, you will also need to learn photoshop/quixel (and/or substance)/xnormal/knald etc, etc to make great looking textures for your models.
It is a long and challenging journey, but if you are really enjoying modelling its loads of fun.
Which is most important. keep having fun!