[Plugin: NextGEN Gallery] Please help, Idiots Guide to NextGen

Please can someone direct me to a link or site where I can learn how this plugin works. I tried the forum but there are so many pages and no search item it will take forever.

I’ve installed NextGen on my website https://www.muskat.co.za/wp/ and its kinda working but I am not entirely sure how the galleries, albums etc work.

I found a post [Plugin: NextGEN Gallery] Czech: How it works / First steps but its in Czech are there similar help topics in english.

Thanks