In addition to the recapping article mentioned by Gleb, here's an article with a few getting-started steps:
http://antiqueradio.org/FirstStepsInRestoration.htm
The following page lists a bunch of TV restoration articles. None of those TVs is identical to yours, but if you skim one or two, you'll see that the general process is much the same for all. One of my first restorations was a 21-inch RCA set; they will perform well after you're all done:
http://antiqueradio.org/televisions.htm
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html