Best Practice - Open Information 4 Surfski Paddeling?

It's hard to find the real valuable information in the internet...

Where I get the open access to really valuable information about the Surfski and how to grow to some decent paddler?

The best I found up to now is:

Henning Hansen: SURFSKI
A paddlers introduction

www.surfskiracing.org/Downloads/Surfski_Intro_EN.pdf

E.g. is there something good intro about SK-Drills?
Or other valuable information, which will help me to come advanced in this fascinating topic?

best basic paddler technique and drills sources are the you tube vids by Oscar Chalupski, and Ivan Lawler. Mount a go pro on the front deck and film yourself and you will soon see what you are doing wrong or right. Oscar is big on surfski drills, and ivan is good on efficient forward stroke technique

You may want to check the website of paddle2fitness. 

paddle2fitness.com.au/podcasts/

They have almost 40 podcasts (and they keep on adding 1 a month) about different topics on surfski paddling. Also have a great video analysis service that you may find very useful to correct and improve your technique. I have tried it recently and found it really helpful.

Another great resource is the Mocke brothers online courses

www.101learn.online/category/sport/surfski/

Happy paddling

Juan

Paddle2fitness is very interesting; although it does highlight regional differences. They have a podcast on paddling into headwinds. In that, they call 15knots a strong headwind.

If I considered 15knots a strong headwind, I'd never go paddling. Winter, here, normal wind is 20 gusting 30, a breezy day is 30-40. 

I found a lot of tips in the Surfski-Wiki: e.g. Forward Stroke Technique

surfski.wiki/stroke