@hotsauce first thing you want to do is check that the rim has retention ridges along the bed, where the bead sits. These can be easily felt by running your fingernail from the sidewall corner towards the center channel. If you don't feel a catch/small bump, the rims are a no-go, at least with HP road tubeless. Without that catch, the tire can break a bead under heavy cornering.
Tubeless tape is simply plastic strapping tape; it will be smooth, and go from sidewall to sidewall. Most builders will install the tape on tubeless compatible rims, since it also functions just fine as rim tape.
Mounting the tires can be easy or hard, depending on how well the rim is designed, but the general gist: install one side of the tire, install a tube, install the other bead, and inflate until they pop into place. Break one bead completely after deflating the tire (note: if both beads pop off, don't proceed–burping is super dangerous at high speeds), and remove the tube. Install your tubeless valve, replace the bead over the sidewall, taking care to only use as much of the well as necessary, or inflating may be difficult. Inflate as usual, either with a high-volume pump or CO2.
If you have a compressor, you can usually skip the tube step.
You can add sealant directly to the tire before pushing the last section of bead over, or through the valve, if you prefer.
