Thanks for the warm welcome everyone!
I will definitely consider your advice on what to start work on but I cant make any promises on anything at this time.
I realise that at first it will take some considerable time and effort to just be able to get up to speed and get some kind of grip of the codebase. At least the general structure of it.
As my first task however, I am probably going to choose to scratch an itch of my own to get going. One thing that come to mind that I find a bit annoying is "selection"; both selecting points, lines, etc when in sketch mode and when selecting edges and vertices in the 3d-mode. Basically I find the selection tool is way too sensitive or picky about placement to be able to select. I wonder if I could either just increase "the zone" around a particular element for which it will be highlighted and selectable or if it perhaps (probably) is more complicated than that.
Another itch is in TechDraw, the default line widths and styles doesnt follow what I consider good (standardised) drawing practices, so there is some room for improving I think. Sane or at least a bit saner defaults.