I want to pursue soical work. Can I do it after 10th like a Diploma in social work kind of course?

Yes, doing BSW will be a good option. Meanwhile, you can take part in any NGO around your place to get an idea, what is social work. Then you can be good enough to do the course too. This course is totally experience-based so you can work for some NGOs.

I shall suggest proper and advanced level studies if you want to really enter, stay and contribute to the Social Work domain. Go for a BSW- Bachelor of Social Work.