Templates/maps for offline training...

I came across the opinion that offline training maps like https://h3hota.com/en/templates#m200-templates, such as 2sm2c(2), would be suitable.

I also found a funny map http://heroes-iii.com/dl/h3basic.h3m. Source: http://www.heroes-iii.com/indtrainp.htm

Maybe it's worth trying to "practice" on popular online templates...