Thanks will try that :) , and are you still reading it or ?
and how is your progress now?

I recommend the book "Mastering Regular Expressions" by J.Friedl. I read only 100 pages out of 500 and already pretty good with regex.

Same here, I've put my focus more on the applicable things to get myself up and running, and letting regex be more of a side-interest that I can always google when needed and learn by association. https://regexr.com/ is useful for testing out techniques and adjusting results

The way I look at it, at first you don't necessarily need to know how to build one to use it, just know what pieces go where and test it out to makes sure it works. Then as you see various examples for differen't purposes, the syntax starts to make a little more sense.