Gladly! If you would like to start just go to https://mythiccraft.io/manual/doku.php/databases/mobs/overview and read up on that, but I must warn you it takes a lot of practice and time to completely learn and memorize it, you should start by creating a test mob first, then create a few more, see your what your current skills are at that point then, and I'm stressing this A LOT because its the most important aspect of creating MythicMobs, you NEED to really study up on your skill making skills, what I mean by this is you can give mobs skills like "Pierce" which damages the target the mob is fighting, along with striking each player with lightning and simultaneously creating an explosion effect all at once. I use Caret to write my mobs and writing version me YAML (the very bottom one) because it's what MythicMobs writes in and making this the default option makes things 3 times easier and better to write. There are many other writing programs like Notepad++ and Atom along with many others but use whatever one you prefer! It has no difference except what's easier for you to learn.
Thank you so much for the idea, I just simply love it so I made it. It was fun to make and if you would like to download it go here: https://mythiccraft.io/index.php?resources/free-mob-pack-mob-pack-1.642/ now keep in mind if you want to see these mobs in action with their special skills and all download the MythicMobs plugin for your world and put the mobs/skills/items/drops into the corresponding folders in the plugin, once again thanks for the idea that gave me something to do and if you don't mind replying to this telling me what you think about it please do!