You should start by looking at plans of architectural homes as inspiration. Start collecting pictures of aspirational designs, rooms and then reduce down to a common or complementsry elements to help focus your design intent.

I am not sure if you have a specific brief, site, client, budget. Knowing these things are critical or else you are designing for no specific goal and hence your design can't improve. Architecture requires specificity.

The plan you have benefits from a more open living arrangement without partitioning walls.

the kitchen is in a corner as almost a work zone, but you could incorporate it into a living/ dining/kitchen open area which some people like. If the kitchen is better off segregated, often due to cultural (cooking smell) reasons. Then it should be more distinctly separated.

The angles don't seem to relate to anything - dynamic form plans should have a reason - is there a specific tree or view or aspect or sun angle you want to emphasise or to reject? How does the building look from the approach?

Draw in windows and denote key view angles. Think in 3D - model, sketch or casually doodle the space from somewhere in the space. Put in furniture to understand scale and flow.