You’ve done a great job @rehanqwer! Blender isn’t famous for its hard-surface sculpting so it’s very difficult to get surfaces perfectly straight. More practice will help to refine your technique, BUT I really think most of the wobbliness will be solved if you continue the workflow into retopology.
Retopology will result in a much more efficient mesh that simplifies the shapes. Meaning it will be smoother with crisper edges.
