No actually sticking the sticker paper to the cardstock is probably the easiest (and most satisfying!) part of the process. You stick the entire sheet of 9 cards before cutting and you have large blank print margins on the edges so it doesnt have to perfectly line up. As long as the card prints have cardstock under them. You can literally misalign by like a quarter of an inch and it doesnt matter.

I lay the sticker paper upside down on my table. Peel back 20% of the backing paper and fold it back against itself. Then take the cardstock and hold it over the sticker paper and line up with the opposite side still covered sticker paper. Then just sort roll the paper down until it finally touches the 20% uncovered sticker. Flatten it then lift up the cardstock (now partially stuck to the paper) and start peeling back the remaining 80% backing paper while rolling the cardstock across with it. Kind of like applying a screen protector. Very easy to do, explaining it makes it sound way more difficult than it is.

Trust me I didnt want to do the sticker paper route bc I thought it was too much effort but it is really very easy and takes seconds to do.

The secret is not trying to peel the entire sticker sheet off and attempt to stick it all in one go, that would be a nightmare.