I'm new too!
So far the site isn't that difficult to understand and my lack of linden dollars isn't as distressing at I'd thought it would be {I have no intent to spend my real life money onvirtual currency, I've learned that I get bored easily after buying money so I'd really rather not waste my money }.
I'd say inworld is definitely harder than the forums and the slang like "rez" might be hard to get used to.
Unless you have a slow laptop {like mine =_=} then I don't think inworld should give you a problem. I justgot messed up on navigating with the arrow keys. Good luck!
~Fellow n00b :3