Hi aspirant
At a score of 588 you can expect your rank to be around 23k-24k as it was in NEET 2021.
However this year may differ as the cut off changes every year. More or less it will remain the same.
You can predict your rank for NEET 2022 using our rank predictor by using the link provided here.
https://medicine.careers360.com/neet-rank-predictor?utm_source=qna&utm_medium=neet_rp

You can also predict your college using our college predictor tool with the link below.
https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp
At this rank you have a hard luck finding seats in government medical colleges of your state. However you do have an option of opting for private medical colleges in Karnataka.
Here is a list of the best private  medical colleges in Karnataka.

• KMC Mangalore - Kasturba Medical College
• St Johns Medical College, Bangalore
• KMC Manipal - Kasturba Medical College
• MS Ramaiah Medical College, Bangalore
• VIMS Bangalore - Vydehi Institute of Medical Sciences and Research Centre
• KIMS Bangalore - Kempegowda Institute of Medical Sciences
• JNMC Belgaum - Jawaharlal Nehru Medical College
• Dr BR Ambedkar Medical College, Bangalore
• JSS Medical College, Mysore
• Raja Rajeshwari Medical College and Hospital, Bangalore
• Father Muller Institute of Medical Education and Research, Mangalore

Now since you have not mentioned what category you belong to, I can't be too precise with the information.
Hope this helps
All the best.

Hey aspirant

Your son have a good chance of getting admission  in following colleges.

Adichunchanagiri medical college and research, AJ institute of medical college and research, Al ameen college of medical science, Akash institute of medical science and research, Basaveshwara medical college chithradurga, belgaum institute of medical science. This is based on previous year sources.  For more details refer below link https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp

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