I've been on the tools for over 20 years, finishing everything from house slabs to commercial jobs around Perth.
I still run Leo's Concrete Works, so I'm on pours every week.
A finishing course can teach you the basics. Out on a slab it's different.
Perth heat, the sea breeze, a mix that goes off faster than you planned.
Most finishing comes down to timing, and you learn timing on real concrete with someone next to you who's done it thousands of times.
That's what I teach. No classroom. Real pours, and straight feedback on what you're doing.