Went for my 2nd ride back today - still feels great saying it!!
Took the bike out for a 45min easy spin, covering around 13.5km at a lazy 18.5km/h average... Headed out to a nearby industrial area (which is quiet on a Saturday) and did a few long loops on the wide streets. Then continued on around the surrounding suburb, on a combination of quiet roads and bike-paths.
Legs felt good (as they should on such an easy pace!), I 'felt' my left shoulder but there was no pain, and mentally I felt sure and confident.
I'm still only 'slowly' returning, but this morning was a strong step forward toward regular cycling again. Happy days... :)