Designing an arch feature with cabinets - Home Designer Pro

[justnelson6]

Hi there, I'm using Home Designer Pro 2024 on a Mac - I am new to this program, but learning quickly. I am stuck trying to get a rendering of an arch feature with shelving into the cabinet area. I will post inspiration pics (pic #1) and what I've been able to do in the software (pic #2). 

 

What I've done so far is made a wall niche in the size and shape I'm looking for but it's not giving me the depth i need for the rendering. Plus I'll want to fill in the area at the top of the arch to make it join the side cabinets seamlessly.  Any advice would be greatly appreciate--again I am quite new to the software.