Can I update to iOS 13

Nope.

The 2013, 1st generation iPad Air 1 cannot upgrade/update beyond iOS 12.x.x.

Your iOS 12.4.8 is the current maximum iOS 12 versions.

The internal hardware is too old and not powerful enough to run all the new and advanced features of any current and future versions of iPadOS.

If you need an iPad that can run the latest and greatest versions of iOS, as well as, the most current apps available, then, you need to purchase a new iPad from Apple or a discounted, refurbished iPad from Apple’s Refurbished & Clearance section of Apple’s Website or a new or refurbished iPad from an Apple authorised, third party retail or online reseller OR other trusted sources for new or used Apple products.

Best of Luck to You!

Not on your device, you can't. As we've already told you, your device is not capable of running anything higher than iOS 12.4.8. Since the beta program is iOS 14, you cannot use it. If you want the newest software, it's time for a newer iPad capable of running the newest software.

If you have the first generation iPad Air as your signature suggests, you cannot update past iOS 12.4.8. Released 7 years ago in 2013, it is now a no longer supported device. Sorry.

No. 12.4.8 was only released for models incapable of 13 or above.

(183269)

Nope.

Your device cannot run ANY versions of iPadOS.

None.

Not even the Beta versions.

Same reasons apply.

Sorry.