Hi Richard,
It has passed many days since getting your advice to start my project accordingly. Yes, the KiCAD satisfies my professional need. From crafting a schematic, PCB design, Gerber output, and then ordering sample PCBs and SMT service by JLCPCB, all worked well.
Some members gave me precious advice of perspective with other cads. I am grateful to all of them.
Thanks again,
Joshua