I am Indian national wants to get marry with Russian

Dear Sirs /Madam , I am Indian national wants to get marry with my partner (Russian Native) . We wants to get marry in Russia(Moscow) . Below are some question in our mind and wish to get your advice . 1. Is that possible we get marry 1st in Russia , and then notify the Indian Embassy in Russia regarding the marriage . Is that possible to get certificate from Indian Embassy in Russia. 2. If we get marry in Russia , and after some time we get registered our marriage in India with valid Russian marriage certificate , but not in notice period of 30 days , should we fill some affidavit defines the cause not to present in 30 days . 3. Any other procedure , there i notice Indian registrar prior to marriage in Russia , and ask to for some more time to present in Indian registration office . 4. After get marriage certificate , what is the procedure to OCI Card . And how much money we have to spend . 5. After this procedure if further we want to apply for Indian citizenship , what is the procedure for the same.