i can't find a pattern for the life of me

So as a first proper home project i was planning on making a pair of bloomers and a matching vest but i can't find any good in depth videos that have a pattern to said vest, i haven't looked into the bloomers much yet. I did find a video where someone had made a vest that i really liked the look of but the problem is i'm quite new to sewing and they had developed the pattern themselves and i can't really follow their pattern because i just don't know how to. Does anyone have any advice or a pattern that's similar to the one in the video i could really use the help <3

https://www.youtube.com/watch?v=kwYUnvD_hjA