I spilled water on my 2017 MacBook air

Shut down the computer and disconnect the charger. Do not use the computer. Get it serviced ASAP.

Make an appointment at the Apple Genius Bar for service after the stores re-open. If you need to find an Apple Store - Find a Store - Apple. Also, see How to find your nearest Apple Authorized Service Provider (AASP) or Distributor (AAD). You may also get Apple authorized service at a local Best Buy or contact Apple Support for more options.

Contacting Apple Customer and Support Service

1. Apple Store Customer Service at 1-800-676-2775 or visit online Help for more information.
2. If you just purchased the product, then you get 90 days of free telephone support from the date of purchase of your Apple product.
3. Primary support help at Contact Support.
4. To contact product and tech support: Contacting Apple for support and service including international calling numbers.

I think your MacBook Air needs to repair, probably logic board is damaged by the water.

Try to contact Apple support or make Genius Bar reservation if neighborhood retail Apple Store is open or find opened nearby Apple Authorized Service Provider to be examined your MacBook Air.

https://support.apple.com/contact

https://www.apple.com/retail/geniusbar/

https://locate.apple.com/findlocations