Self-study
I'm not quite sure what constitutes as a Professional/Occupational License, as there is no list. I'm assuming careers like nursing and trade unions are a given. But how long is the list?
For my example I've been in the Food, Beverage and Hospitality for almost a decade now. I was at a point to studying to become a certified wine educator. I got as far as "advanced" but no "diploma". The link below explains a lot more of what the certifications entail.
https://www.wsetglobal.com/qualifications/wset-level-3-award-in-wines
The weird ones test our knowledge of inferences and reading through tricky wording. Remember that super hard dinosaur game, I think it was somewhere in the 50s? You can brute force your way through it but it took like 15 minutes, but if you made a specific inference it was a 9 minute problem set.
We just have to do the work up front and that all depends how you want to use your time. I prefer to write out %90-%100 of all my game boards. That extra minute of writing it all out, cuts my time significantly when I'm doing questions. For example, there is a basic sequence game but it's a curve ball because of the setup. It's the stones and mulch with the dump truck having to be cleaned. Brute force your way through it first. Then on your second go around spend the time to draw out ALL the scenarios. See if that helps you make a difference.
If you have trouble making inferences, treat it like the puzzle game Rush Hour, where you are stuck in a traffic jam and you have to move other cars out of the way in a certain pattern to be free. All of the game pieces have certain levels of restrictions. I could get in to more detail, but it's gonna be a wall of text, so if you want holla at me.