If this is a new license purchase, you should have received access to a very comprehensive training regimen. And then there is the Learning Connector that also is provided for one year with a new license.
If you simply inherited a seat then you do have some searching to do. However, you might get your employer to sign you up for the PTC university to get you through the basics.
Otherwise, yes, it is a lot of work to get up to speed in Creo. This forum is probably the second most helpful resource to get you through the rough spots.