Second the tubelesswheels.com guide, nice and easy.
All i would add to his guide is
1) Stans sealant seems to last a bit longer than the JRA wheel milk, although both do the job well.
2) Second Doug’s advice. i had all sorts of issues until I made a point of building up the bottom of the rim well with insulating tape. I deliberately used four or five layers of tape. This makes the tyre really tight to get on, and as a consequence you might have to then fish out the rubber strip again, but having done so, and having soaped everything up, it should inflate easy.
As a bonus, i never seem to have suffered from burps, which may be down to the tight fit between tyre and rim.
If all else fails, a cheapy CO2 inflator makes life a bit easier!