A free update available today, April 19th, will patch in a training mode for For Honor on all formats. The Apprentice Trials and the Warriors Trials are for the newcomers and will teach basic and advanced techniques, and will include a grading system so you can measure their progression. A media library of tutorials is also part of the package.
Additionally, a Training Arena that “will give advanced players the opportunity to further perfect their mastery of the Art of Battle and customise their training experience by practicing against specific Heroes or move sets,” is also included.
Source: YouTube / Press release