[brudgers]

How to find customers?

This is really the first item in the critical path. Nothing else matters until this is solved. Time spent on anything else before this is answered is mostly wasted and there will be a strong incentive to spend time on everything but this because finding customers is harder than coming up with pricing, imagining ways to make trainings successful, following tips, printing business cards, renting office space, etc.

There's no checklist for finding customers, just a lot of potential rejection (and perhaps no acceptance if there is no reasonably accessible market). This is not particular to software training, freelance programming, private piano lessons, etc. Finding customers is the fundamental first step of a business...and it mostly comes down to being able to sell yourself and close sales. There are no shortcuts.

Good luck.