The PyMC3 discourse forum is a great place to ask general questions about Bayesian statistics, or more specific ones about PyMC3 usage.
Learn Bayesian statistics
Many areas have an local Bayesian, PyData, or Stan meetup.
...with a video!
There is an actively curated playlist of PyMC3 talks on YouTube.
Advance Bayesian Modelling with PyMC3
A two days advance workshop in May 2018 @CEAi in the Czech Republic.