[Tex86]

I'd recommend arbornomics, not the franchise and supplement with milogranite, maybe micros (soil test?). Can you expand on what your describing? (Runoff)

Cut down that sloppy cleanout pipe, order a recessed cap. You'd be surprised how easy it is and you can mow over, not around. Is that a pop up drain emitter in photo 1?

Read leveling threads. ...

Welcome Adrian! Good to have you here. I have very little experience compared to these giys, but I'd definitely recommend on getting a soil test done like Jayhawk recommended to see what macros and mixros you need to put down.