Inochi's timeline

1. Parents died at 4 years old

2. Obito and Rin died within a year, so she was around 5-6.

3. Minato and Kushina died; Naruto was born when she was a bit older than 6 years old.

4. Lived with Kakashi till she joined the academy.

5. Joined the academy at 8 years old.

6. Graduated at 9, became a genin and adopted Naruto.

7. Became a chunin at 10.

8. Joined the ANBU at 11.

9. Became a part of ANBU root soon but did not get the seal upon Hokage's intervention.

10. At current stage she is about three months younger than 13.