https://www.desidime.com/discussions/charges-regarding-nps?page=1#post_8247647
There is some quarterly charges, but I don’t remember how much.
If u want employer’s contribution to nps, the employer should be providing this option. So, check with them, if it is available or not. If it available, then the account will be required to be ported to some bank with which your employer has tie up. Enps will not work.