New to me 2016 Prostar- What now?

[InmotionProstar]

Just bought a 2016 International Prostar with an ISX 2350. I've started researching the info on this forum.....

First step, oil bypass system- Amsoil BMK30?

EGR tuneup due... Are there any videos specific to the 2350 or are Rawse's 870 videos close enough to show me how to do it?

Next steps? Take it to Haggai? I'm only about 2 hours from him.

Truck has 277k miles. Was a repo bought that I bought at the local used truck sales place. I have no idea how it was maintained.

Still has factory warranty for another 6 months or so.

Appreciate any input guiding me on a step by step process to make sure this engine lasts as long as possible.

Thanks in advance.