Well done and good luck.
It's a big step, but it's one that could authentically change your life and shift your perspective. I can only speak anecdotally, but returning to further education has made me more confident than I was, more sociable and better able to cope with bouts of depression; returning to education was worth it for the social skills alone.
One of my favorite quotes, one that captures the essence of feeling purposeful is "If you want to live a happy life, tie it to a goal, not to people or objects". College aloud me to feel greater than a piece of cosmic driftwood, that I could learn about the world and with enough dedication I could change it on some level. I still suffer from social anxiety, I still travail through dark days but nothing in my brief life has made me feel happier than the reflection that I am knowledgeable in a discipline, that I now have an identifiable skill set and that I can admit to more than being unguided.There's very little that contributes more to your well being than defining who you are.
College is not a magical cure-all; you'll come under academic stresses and it may take a while to bond with others, but you have so much to gain; including a reinvigorated life, a sense of self and a desire to learn about and change the world around you.
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Sorry if this sounds like total horse[censored]...