It's been a couple of years since I formally invested in training for myself, so I booked out 2 days of my diary to become an accredited Mental Health First Aider via Mental Health First Aid (MHFA) England
What a fantastic use of 2 days. The topics were pretty tough going at times, but incredibly relevant in todays world - both inside and outside of work:
The facilitator Scott was a secondary school teacher who delivers these courses during term breaks, did a top job - really brought the topics to life in a safe environment.
If you get the opportunity, I really would encourage you to understand some of these topics in more detail - you never know, you might end up saving someone... or even save yourself!