"Going out" just isn't me. Most of the time, I just want to stay at home and communicate with no one. People think me weird, and say I ought to go out more but I feel more comfortable staying home. Maybe I am too timid. Maybe I am bashful or boring. I don't know. I do know that I should go out, communicate, and work on being less introspective. And yet, I know that won't happen so long as I remain a homebody.
Other than just two true errors, all my other suggestions are just to show you some nice ways of saying things. The true errors are these:
"I should ... practice BEING less self-conscious"
"I won't change myself INTO being someone"
There is nothing wrong with short sentences like "I don't know". Short sentences can be powerful and to the point. Not every sentence needs to have subordinate clauses or phrases.