Jim, no dumb questions at all. FTA, OTA, UHF/VHF, LNBs, HD, SD, then throw in Dish 1000's, 500's, 80cm, 90cm's etc it can all get very confusing and as a new comer once myself (we all were) it can get overwhelming.
Trust me, it really does not take a degree in engineering to learn it or understand it. Just a willingness to actively read and not feel dumb asking questions. The one thing I think you'll find here is everyone seems to remember that THEY were newbies at one point and very seldom do you find someone treating newcomers bad or talking down to them. The FTA section more than others is IMO is very friendly and helpful. The hard part is knowing how technical a person is how to phrase responses. There are some incredibly knowledgable people here regarding many subjects including FTA. Their smarts were learned, not built in!