Welcome to the forum
The frustration you are feeling is a part of just about every unicyclist’s learning process. Unicycling can be learned by anyone but it takes persistence. Somewhere there is an average estimate of how long it takes to learn to ride. I don’t recall the number but somebody will post what it is. It’s longer than you would think it would be.
Keep it up, riding a unicycle is a great accomplishment and a great feeling once learned.
Just relax and enjoy the journey. There is a good thread for beginners to talk about their frustrations, accomplishments or to ask for help. (the whole forum is good for that but most questions have been asked before so search before posting is good advice).
Here is the Beginners Today I . . . topic
5’ is a good start. Basic advice is to keep your head up and your weight in the seat (this is key to success) and don’t be afraid to flail you arms around like a lunatic.