spark plug replacement instructions

Here are some guides that will help with this:

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Plus here is a video on a similar vehicle:

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

I attached the info from the manual below on how to replace these on your engine.

Lastly here is a guide that shows how to properly gap a spark plug in case you need this:

https://www.youtube.com/watch?v=c9_NVXiwvYg