No problem fldr, glad to help.
Yeah, we're pretty new to video editing ourselves, but there are loads of resources out there to help you.
Large file sizes could be due to the format of your finished video. For example avi files are much larger than mp4. Also some video editing packages let you choose a quality setting for your video, and the lower the quality setting, the smaller the end file.
We're not experts, but if you get stuck give us a shout and we'll try to help if we can.
Anyway stick with it, and you'll get there in the end