Hi everybody! I was selected as well

Actually, I didn't expected to be so lucky and I'm completly unprepared!
I want to do AOS, I'm in the US on a J-1 visa. If I've right understood, I have to wait till October 1st for my CN to be current (I'm European and I've got CN 4###) before I can send the I-485 form to USCIS.
Meanwhile, what do I have to do?
I've read in this forum people are sending DSP 122 to the KCC with a cover letter, a copy of the barcode and two pictures. Where do I find DSP 122 form? What should the cover letter say?
What else should I do while waiting?
I guess I should get all the following done by October, am I right?
1)Two passport-style photos
2)Form G-325A, Biographic Information, if you are between 14 and 79 years of age
3)Copy of government-issued photo identification
4)Copy of birth certificate
5)Copy of passport page with nonimmigrant visa (if applicable)
6)Copy of passport page with admission (entry) stamp (if applicable)
7)Form I-94, Arrival/ Departure Record (if applicable)
8)Form I-693, Report of Medical Examination and Vaccination Record
9)Applicable fees
10)Certified copies of court records (if you have ever been arrested)
11)Copy of the principal applicant’s selection letter for the diversity visa lottery from DOS
12)Copy of the receipt for the processing fee of the diversity visa lottery from DOS
13)Principal applicants must also submit evidence of a high school diploma or its equivalent, or evidence of 2 years of work experience in an occupation requiring at least 2 years of training or experience in the past 5 years.
I am not sure to understand, though.
For instance, what does biographic information mean?
What is number 3? Is it the passport photo?
Where should I do my medicals? What does it consist of?
Beside the diploma, do I need to provide copy of my Degree and Master?
I'm really confused..
Thank you for all advice
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