Dreamwidth Development Training

I'm a really, really new developer (fired up my dreamhack for the first time about an hour ago) and I've been working through the documentation and poking through the code. I've found an unclaimed bug in a babydev bug list which looks like a nice place to start.

My question is should I claim the bug on bugzilla now, or wait until I'm reasonably confident I've found all the relevant bits of code and have a plan for how I'm going to go about fixing it?