I highly recommend asking one of your co-workers for help. Also instead of jumping head first into the help contents start with the tutorials first. They should be accessible from the help menu (Help>Tutorials). Once you have gone thru all of the tutorials then come back here for help on a specific problem.
ACADuser
Civil 3D 2018, Raster Design 2018
Windows 7 Enterprise
Dell Precision 5810 Workstation
Intel Xeon E5-1630 v3 @ 3.70GHz
32GB RAM, NVIDIA Quadro K2200 4 GB GDDR5
DUAL 27" Dell UltraSharp U2713HM