Its definitely a fun part of the hobby, even more so while flying is being restricted due to covid. More excuse to tinker and build.
Built my first quad this lockdown 
gave me something to do so that I didn’t go insane. Lol
That’s my build thread some good info in there on the parts that make up a quad.
Also @Steviegeek and @notveryprettyboy have a build thread:
7 inch quad build thread. Start to finish
Again lots of good information on building your own quad.