Lots of golf-type schemas here, if you know how to interpret them. The biggest and most important thing you need to understand is normalization. If you don't yet, study it before jumping in to an actual db. Then there's all the supporting stuff about naming things, understanding auto numbers, impact of using multi-value fields (most experience developers don't), etc.; stuff that I have no idea if you know all about or not. If you understand Excel real well, it's more of a handicap than an asset when it comes to designing a database.
So if the schemas at the link are like a foreign language to you, I'd guess you don't understand normalization.
Moke123 - Wow, 22 minute delay before your post showed up.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.