Specific advice depends a little on which rims you're using: standard or UST-compatible, and tires: standard, UST, or tubeless ready.

Either way, here are my more general suggestions:
An air compressor and a schrader adapter are necessities.
Soapy water solution is the best way to find leaks. I prefer to use a spray bottle, rather than a brush and bucket.
Valve stems with removable cores sound like a good idea, but are a pain. Use standard ones and the tools below.
My favorite tubeless "tools" are a turkey baster with removalable "injector" tip and removable bulb, and those little 2 oz. squeeze bottles. Both can be bought at a kitchen store. The turkey baster with tip makes a great funnel and only requires you to crack a tiny section of bead. The squeeze bottle makes for easy pre-measuring and transfer of sealant.

Be patient with it, be prepared to repeat steps, and good luck