Welcome to the future.
So, I started learning bash way back.. I would say it took me maybe 2-3 weeks to be completely comfortable. Everything from file creation to moving directories from one machine to another. Don't try to force yourself. Just learn at your own pace. Ubuntu is one of those systems where almost everything is already setup. When you are comfortable with Ubuntu try another distro that requires YOU to set stuff up. I recommend Arch for that kind of thing. When you boot the system, there is no graphics (the live disk anyway). Then you have to do EVERYTHING in CLI. What seems to help is just diving in. Doing everyday activities in the terminal. (moving, deleting, editing files. Reading email *text only*. Installing / upgrading software. )