There are any number of excellent AutoCAD books out there if you need to learn the product (which I doubt). Keep in mind graphic files (and backups) consume MUCH disk space and your 1st concern MUST be to learn what and when to purge and/or update historical data. Other than that AutoCAD is just software that works on computers just like a word processing and/or spreadsheet product works. Relax and leave the programming and/or operations questions to users with the manuals and just keep the security and network structure consistent.
p.s.: If you must learn AutoCAD I suggest you take a 1 year leave and "bust your buns" studying before answering your 1st question. It's an awesome product!