first pcb try

Lots of demos on YouTube.
On your PCB make your Vias the same size as the other pads (if the software allows you to).
I make the IC & Vias pads 80mils, Regulators 120mils, Switches 100mils.
I always elect to make single sided boards with jumpers rather than double sided.
I sometimes add a few transistor/resistor/capacitor pad footprints just in case I want to add a modification later.