Probably the first thing I would do is change the oil and check all the filters. As of late on my Ford F-150 I learned how to change my own oil, so this is the first thing I would do. I have a 3.5 Ecoboost engine, but I can share with you instructions on how to change the oil on these engines, you can do it all yourself. There's a section on that in this article - https://southwestexpresslube.com/oil-for-3-5-ecoboost/ . Plus I picked out the best oil for 3.5 Ecoboost there. Anyway, there's a lot of useful information there.