This is the main preset I use on my Instagram pictures (@haileystickers).
This works on the lightroom mobile app, once you purchase there will be a link to download the file, with the file you need to save it to your camera roll. Then click the export button and choose open in lightroom. It will take the photo to the lightroom app where you can click the "..." in the top right corner, and then "create preset" and title it Haileystickers.
Then you'll be ready to use it!
If you look at the pictures above, the right side is the edited version, and the left is without any edits. (for the last 2 pictures)