If you have any experience with code, or even if you don't but you are someone who learn new things easily, just pay attention the the codes and read the comments. Most of creators, like BB and DC do comment their codes, so you understand what each line does.
Let me give you some advices that worked for me:
1- This is the way I learned a bit: reading each comment and code per se. The magic in any programming language is to understand what is going on, and not just copy and paste.
2 -I suggest you to take your time and read this topic. It contains some great info:
http://www.chronocrash.com/forum/index.php?topic=13.0
3- When I started at OpenBOR, I download the manual to my phone to read it fully (I still have it), then I checked each topic from the link above and reading what each thing does.
4- Read some of the help posts. If you find some useful info (even if you won't use it right now, but can be useful on the future), use the SEND THIS TOPIC function (at the top/bottom of the page) and send it to your email. Put some description so you can recovery it later. Or even print it to a PDF.