When I’m trying to approach a highly specialized topic for the first time, one of my tactics is to find a recording of a research-geared workshop about it and watch it as my introductory crash course. The benefits of this are as follows:

• I am learning about the subject from (hopefully) a credible expert in the field.
• Workshops and talks usually try to be self-contained, which means basic background info will likely be given and I won’t have to pore through 10 different research papers, searching for an obscure definition, in vain.
• Talks typically have the benefit of including visuals and informal intuition conveyed by the speaker, which generally won’t make it into academic papers, because they’re not rigorous. However, the visuals and informal statements and intuition are invaluable for gaining a better understanding of the information.
• The speaker will generally include a bibliography and mention related works, which is a great jumping off point for further investigation and saves me from having to figure out what the seminal sources are myself.

However, there are also some drawbacks:

You’ve started a new job, you’ve stumbled into a conversation that’s been happening for several decades, and you’re feeling way too lost to even begin to follow what anyone is talking about, let alone participate. You’re confused, so you go see John, who seems to be semi-acquainted with the people having the conversation. You briefly sketch out what (you think) you heard, and tell him that you didn’t really understand anything anyone said. Maybe he can help you?