you don't have to identify yourself as "idiot" as there are any number of people who will do that for you.

by asking the question, you have begun the process of fixing. after 10 years, probably anything you do will improve your bike.

start high or low, but start. all the suggestions which have been made will contribute to your understanding of how the machine works.

focus on one task, own it, and then move on to another. it's a process.

don't be intimidated by someone who poo-poos your naïve question: we all come down the chute with the same knowledge. it's what we pick up along

the way that helps us understand.

the Park Tool has good videos & a website which gives instruction/ information. Home Page | Park Tool

Sheldon Brown same sans videos. Sheldon Brown-Bicycle Technical Information

it's almost difficult to avoid the overload of information and sometimes it's more practical just to ask the specific question.

but don't waste your time calling yourself an idiot. that's a click & squeak only YOU can fix!