Wipe rim with meths
Leave for few mins
Apply one rotation of tape with 3" overlap
Cut valve hole with scalpel
Insert tube and leave for 30mins at 40psi
Carefully remove one side of tyre bead
Remove tube and smear plenty of soapy water on bead and rim wall
Fit valve and remove core
Refit tyre and place flat over bucket
Pump like mad.
With a bit of luck the tyre will pop/clang onto the rim. If not then fit a tube and try again anoter day.
If it works then,
Deflate tyre and again remove valve core.
Insert (using a 60mls syringe) about 80mls of sealant (in two goes)
Replace valve core and inflate to 35psi
Shake and spin wheel as much as pos.
Go ride. Take a tube with you. They often loose pressure if it's a new tyre until the sealant has covered everything inside. Some tyres are better than others, I've had some seal within seconds and others that have taken a week.
Once your confident it's holding pressure you can adjust it to suit. I like mine about 20-25psi.