How long to bring up credit score?

I recently took out a loan of $2k. They automatically deduct a certain amount at the first of every month. However, I overestimated how much was in my account and forgot about some other bills. Thus, I missed my first loan payment. I still have not payed it yet. Is it true that I ruined my name for 7 years? How... show more I recently took out a loan of $2k. They automatically deduct a certain amount at the first of every month.

However, I overestimated how much was in my account and forgot about some other bills. Thus, I missed my first loan payment. I still have not payed it yet.

Is it true that I ruined my name for 7 years? How do I bring my score up? Any tips?

PS. I am fairly aware of how dumb I am
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