Before you start laying out your PCB, it’s a good idea to check out the design ... KiCad has built-in support for tented and untented vias. What are tented vias? Check this out: The standard ...

Fortunately, there is e.g. a free KiCad library with ready-to-use PCB antenna designs to help one get started with a custom design, as well as many other resources, covered in the article.