Good luck in your journey! I saw nothing in the work that would help you get a job on even a lower level team but it is a start.
What you are looking to do is create one thing at AAA quality. Just one, you can keep redoing it until it is polished shiny and world class. If you need an example the games you play are the target. Your goal in these troubled times of mass layoffs and studio closures is to do something better - cheaper - faster than other people that are also trying to get jobs. Plot the shortest course along this thinking.
This has always been the way it has been, it is a what have you done for me lately industry, so even if you have been working for decades as a pro like me you still have to keep reproving yourself to be worthy of being in the industry.
The Epic courses are cool, the certificate are fine I guess, I would never hire or not hire someone based on if they had a degree or certificate even though I know people pay a lot of money for this.
The goal as a level designer is to create fun, putting all the parts together to make something someone else is going to want to play. Creating fun is part technical skill and part being gifted at creating experiences for others that they love.
Again good luck, as a side note and if I was you I would remove this thread from Job Offering section of the sub and post it in the seeking work section. The audience would be looking there not here for new talent on your well (over) documented journey.