i m not getting dates for student visa so can i apply for tourist visa and then convert my tourist visa into student visa
No. This is not allowed. Tourist visas can't be "converted" into anything else. You must get your student visa while you are still in India. If you come to Poland on a tourist visa, you will not be allowed to study unless you return to India and apply for a student visa there.
Can anyone help me to get student visa ? from india
No. And anyone who says they can help you is a fraud scam artist who will steal your money and give you nothing.
You have to do it on your own. No "agent", "consultant" or "recruiter" can help you. They are thieves if they tell you they can help with getting a visa. Stay away from them, and don't believe a word they say.