Yes these are from you. I tried dming you on discord about it a bit ago but a I never got a response. If you want I can add credit in the description once I am back home.
Here is the origins discord: discord.gg/E84xyXat Also its best if you use this discord to learn and then look through the files I put in the description (mainly the jump power that you are asking about which can be found by going to Dolphin Origin\data\dolphin\powers\jump)
You are not an idiot! Here is the discord: discord.gg/origins-mod . This is where people make custom origins and you can easily make one yourself. Follow a tutorial and make a datapack. If you don’t wanna make one yourself, I’m pretty sure there is a section to post ideas for origins but no guarantees it gets made.