You will almost never "feel" like writing, so you'll have to force yourself to do it.
Depends on why you are writing. If you consider writing as a hobby, then it can be a good release from stressful everyday life. Some people do sports and achieve the same result. Therefore, one can also have the need to write, just like sports.
I wouldn't let anyone read it until I'm mostly satisfied with it.
Feedback from other authors can help, too. If you're still learning, I wouldn't pass it up. Or go to writing classes and learn. Then go to professional writers who offer such courses. Look at offers from publishers who offer courses for writers (Novum publishing,...) read blog articles, look at tutorials on Youtube,.... There are many possibilities. But I would not be ashamed to show my creations to others. No master has fallen from the sky:)