How do I charge my new Apple Watch??

See the instructions here, Charge Apple Watch - Apple Support If you have an additional question, come back.

You can use any USB-C port on a personal computer.

You can use the USB-C charger from a recent MacBook Pro, iPhone or iPad.

If you have an older Apple Watch, you can use the charging puck and charger.

You can buy any vendor’s USB-C charger at Best Buy, Staples, Amazon, etc…. A 20watt or higher will enable Series 7 Fast Charging.