Hi. I screenwrite since 6 or 7 years. But I don't have much to say and anyway you can find tips all over the internet. I use korean format (with visuals) and sometimes the regular western format. I use Writer Solo for western screenplay, it's a free software of high quality and good ergonomy.
You can read my profile here, with some info, and my blog with my various screenplays:
https://w-two-worlds-season-2.blogspot.com/
Here an article I made about korean screenplay, my visual format, and comparison with western one:
https://w4worlds.fr/html/W_Saison2_Script00_US.html
I wanted to write articles about that on MDL but never had time to do it, because I'm focused on rewriting last parts of my main kdrama.
Main point for screenwriting (or writing as general) is to have to good story to tell, something that motivate you, and to work. Work and write a lot. Then, various tips you read have a meaning. But I observed that for many people, trying to stick to someone else process or a rigid structure doesn't work so well. It blocks freedom and creativity. First have a story, then you can work and rework it, based on knowledge you slowly grab, and knowledge you discover by yourself.
About outlining, or at least have a beat sheet (resume all the points of a story), it's a must. At least, if you write series with plot-twists, concept, you need it. I planned my main kdrama during one year. Meaning I wrote almost nothing but only structure of the story. Most of people who didn't plan and outline just give up their story halfway. Or they write "vomit draft", meaning they have to rewrite everything after. What is one more draft, because keep in mind that even with a good outline, rewriting will be needed.