Ensuring your 4-Layer PCB Stackup is working as intended is one of many responsibilities that Altium Designer’s layer stack manager is capable of.
Use circuit board template in your design process to ensure easy consecutive designing.
In your career as a designer you will design many oddly sized and shaped boards including circular PCBs. You need the power of Altium Designer for these jobs.
Not only do you need the best PCB design tools that you can get, you need schematic capture and design tools with the most up to date Gerber PCB software. You need Altium Designer.
You can make the transition from being a hobby PCB maker to a professional designer when you use the best PCB design tools in Altium Designer.