Looks like going to answer the door means most of what I typed in reply has now been covered so I'll just leave the last bit:
Please take the time to learn as you go and ask lots of questions. I'd suggest you start by reading the seminal resource on the web for bikes:
http://www.sheldonbrown.com/
Everybody has to start somewhere but you kind of dived in at the deep end with this one.
@Fixed&Broken started
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Looks like going to answer the door means most of what I typed in reply has now been covered so I'll just leave the last bit:
Please take the time to learn as you go and ask lots of questions. I'd suggest you start by reading the seminal resource on the web for bikes:
http://www.sheldonbrown.com/
Everybody has to start somewhere but you kind of dived in at the deep end with this one.