Nighthawk M6 pro

I have a Nighthawk M6 Pro router - I live in a semi rural area with no NBN / fibre network . the house has many dead spots. in fact the whole house is a wifi free zone except for the room that the mobile router is in..

can I extend this with a Mesh system, if so are they all compatible? some have a router + satellites .. do I need ANOTHER ROUTER ? or just a heap of satellite units?