We share Raydream as a 3D entry point!

modo definitely uses a different methodology. It will be just a brief familiarization. modo makes extensive use of contextual 'common sense' menus that make using it unbelievably easy. There are some getting-started tutorials on the Foundry site. I personally bought a couple of the pay-for tutorials from modo/Foundry when getting started, which significantly accelerated my use of the program. Watching others use modo will answer a ton of questions and leave you smiling with what the program can do.

Not to sound like a modo fan-boy, but modeling with modo is actually fun. 

Texturing in modo is based upon a layered system that is more of an industry standard than Carrara's specialized system. That too, may take a little bit to get used to but is very powerful and easy to use. One thing I'll say for Carrara, it's texturing system is probably the easiest I've ever used. 

There is a ton of other modo features that are just super. But I'll stop here. ;)