Cutting Paver with Diamond Angle Grinder?

I need to cut the stone paver in order to dig a trench for the drain pipe to not be a tripping hazard.

1. Can this be done with a diamond blade and 4-5” angle cutter? The closer I get to the house I’ll know I’ll need to use a chisel and hammer to split as to not damage the brick foundation.

2. Also after cutting is there anything I need to do to seal the cuts?

I would love to do this myself if I can (currently would need to buy the angle grinder).

Photos show what’s going on in this situation.

Thanks!