If you have zero electronics experience, that kind of TV is not a good learning project.
You could contact an area radio/TV collector club and ask for a repairman recommendation. Here's a list of clubs in the USA:
http://www.antiqueradio.com/clublist.html
If you want to tackle it yourself, I recommend getting a cheap 5-tube radio from a flea market or craigslist.org to practice on.
This article has basic information about replacing capacitors:
http://antiqueradio.org/recap.htm
Another article that may help:
http://antiqueradio.org/FirstStepsInRestoration.htm
If the simple radio works after recapping, that would give you an idea whether you want to dive into a television.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html