Please help this nearly computer illiterate mom. 
Been using iTunes without problems for a year now. I have subscribed to a several homeschool conventions via RSS feed, and was able to start downloading a few selections perfectly fine. Saturday I hit Get All and left the house for 6 hours. When I got home, I still had a lot left to download, so I just stopped it. Anyway, boring long story short, yesterday when trying to get more of these sessions, I get error 3150 on just about all of them.
Yes, I searched and found it has to do with a network connection. But what I dont understand is why some things download without problems, and only the items I subscribed to via RSS are a problem, and not only that but, not every session is an error, only most of them, once in a while one will download.
So now to show my ignorance, what do I do it fix this network connection problem.
Use small words and simple terms.

Thanks!
Been using iTunes without problems for a year now. I have subscribed to a several homeschool conventions via RSS feed, and was able to start downloading a few selections perfectly fine. Saturday I hit Get All and left the house for 6 hours. When I got home, I still had a lot left to download, so I just stopped it. Anyway, boring long story short, yesterday when trying to get more of these sessions, I get error 3150 on just about all of them.
Yes, I searched and found it has to do with a network connection. But what I dont understand is why some things download without problems, and only the items I subscribed to via RSS are a problem, and not only that but, not every session is an error, only most of them, once in a while one will download.
So now to show my ignorance, what do I do it fix this network connection problem.
Use small words and simple terms.
Thanks!