Welcome to Mac-Forums, mrs.biggo. And welcome to the Mac platform.
If a search doesn't bring any results or answers to your questions, then yes, by all means, start new threads in the sub-forums where they are appropriate. Examples: hardware questions like a failing hard drive on an iMac G5 would go the in Hardware section, in the iMac/Mac Mini sub-forum.
Just remember that the title of the topic is quite important: it has to be as descriptive as possible to help others search for the same problem you are having. Topics titled something like
HELP!!!!!!! doesn't help much the search.
And since you're new to Mac, take a look at a wonderful thread eric put together,
Mac-Forums Switchers FAQ and Information. That thread has proven itself to be quite helpful to many members here who just switched.
Well enjoy your Mac and if you need help, we're here for you! :girl: