Hi aspirant!
You are eligible for Delhi state quota as you said that you have done all education because they consider students who have done their 11th and 12th from there  as domicile.
As for Bihar you can check the state's official website for the exact rules of that state and also see the link given to see the criteria for state quota of bihar
https://www.google.com/url?sa=t&source=web&rct=j&url=https://medicine.careers360.com/articles/neet-domicile-criteria/amp&ved=2ahUKEwjAzJOMrofzAhWzzjgGHXmoAMQQFnoECBMQBg&usg=AOvVaw0wyJhUU8ZtRAE-pUIvEI7v&ampcf=1

Apart from that the cut off marks for Delhi state quota in 2020 was 637 for general, 614 for Ews, 600 for obc. So if you still might have a chance of getting if this year the cut off falls a bit since your score of 590 is very good.

Use this link to predict your college for DU
https://university.careers360.com/delhi-university-college-predictor?utm_soource=qna&utm_medium=du_cp
And this for rank prediction
https://medicine.careers360.com/neet-rank-predictor?utm_source=qna&utm_medium=neet_rp

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