If you'd like some help installing or using Linux, whether it's to replace you're Windows PC, or just to run on the RasPi, I'd suggest looking up your local Linux Users Group http://lug.org.uk/
A quick note before you go though, some are more geeky than others, generally speaking the levels of knowledge about most things is very high, which is a good thing, the downside is that sometimes the cost of that knowledge is a total inability to operate socially in person, when not behind a computer screen.
Don't be put off though, I'm the Treasurer for Bradford Linux Users Group (BradLUG) and our LUG is very friendly and welcoming, with enough eccentricity and specialist knowledge to help with just about anything, but also includes the illusive social skills.
You don't have to be a geek, IT professional, or know anything about Linux to join your local LUG, that's really the point, they are self help groups of like minded people.
Raspberry Pi has created a large buzz with our group, the anticipation is almost overwhelming, so many ideas, so many applications and projects.
It's all about having fun, with the added bonus of learning something you might never have been exposed to.