Jamie Oliver's is decent, it gives the basics well enough so I'd start there. (Sorry I can't share the link, don't know why that is.)
Some simple points that might help -
Don't worry about the details too much, basically it's cabbage, salt & a sauce, left for a while!
When I salt the chopped cabbage, typically I leave it overnight, that works well.
Try to rinse as much salt as possible, but don't stress about it; some residual salt is essential.
Additional veg are up to your preference, they just need to be finely chopped. I've used radish, spring onion & carrot - always use onions - but have never bothered with fruit.
Make the spices easy for yourself: pureed garlic & ginger from jars, gochugaru / gochugang spice paste from oriental shops, some supermarkets or Amazon. Only a small amount of fish sauce as it is salty already.
Fill jars c90%, the fermentation can build up quite a pressure & spray you with a strong red dye!
I burp them once or twice a day & typically leave at a cool-ish room temp for 5 -7 days before packing it back down with a fork & refrigerating for months.
(Made some last week, for Christmas.)
Good luck with this, it's a delicious pickle & easy to get addicted to!