I am well aware of your noob status, i was there once too!!
If you tell us what you are looking for then we will be able to help but firstly have you read the New Members Section thoroughly? Have you used the Search box above? Have you looked in Downloads and Legacy Layouts (LL I believe is donators only)?
Layouts from other sites will/should work but there are some older layouts which will need opening in v5.1(which you will find in Downloads too) when you close v5.1 whilst a layout is loaded in it it will ask you to save, hit yes, now it opens in v20 everytime.
If you have any issues put a picture up and I'm sure it can be solved.
Jason