I am in class 12th and want to pursue MBA after B.Com without any work experience. Will it be ok for me?

Yes, you are eligible. There is no need of work experience after 12th. There is an entrance exam only. Good luck.

Although, it is preferable to do MBA after few years of experience so that you can relate to the management principle taught in the class with your own field experience, but it is okay to do MBA without experience after B.Com degree. MBA graduates without any experience get generally lower starting

You can pursue MBA even if you don't have any work experience. To pursue MBA from IIM, you need work experience.