I bought a light room presets package... How can I download to my light room app?

I think you have posted your problem into the wrong community. This is the community for Lightroom Classic. Lightroom Classic is installed onto a computer, not to a phone or iPAD. It is run on a computer, it stores catalogs on computer, and stores photos on a computer.

You also, do not want the community for Lightroom (not classic), that application is installed onto a computer, runs from a computer, keeps albums in the cloud, stores photos onto the cloud. (IMO it is Lightroom POS)

You probably want the community for Lightroom Mobil (Lightroom foe Mobil $ Apple TV)

https://community.adobe.com/t5/lightroom-for-mobile-apple-tv/bd-p/lightroom-for-mobile-and-apple-tv?page=1&sort=latest_replies&filter=unresolved

I am no expert on presets, and even less of an expert on Lightroom Mobile. However, doing a Google search (hint) I found this video that might help you get started. You'll probably be able to find other helpful videos as well.

https://www.youtube.com/watch?v=FPG81TDQFtY 

Here you'll find infos to import preset in Lightroom

https://helpx.adobe.com/lightroom-cc/how-to/import-presets.html

https://www.lightroompresets.com/pages/how-to-install-lightroom-presets

I'm not big on presets. But you wouldn't download the presets from inside the Lightroom program. You should have received instructions on how to download the package of presets, and that package should include instructions on how to install them to Lightroom. My personal opinion (and it's not worth much) would be to get familiar with Lightroom itself before worrying about adding a lot of extra stuff.