No, two full cash one way flights (2 different PNR) for yourself only, and paid directly to Air India via website or app. (Not through agents)
Also, you have to be on those 2 flights, you cannot be a no show.
Buy 2 one way tickets, not one return ticket.
Five working days after the second flight you will get some points because you have paid full cash.
After that your existing points will automatically get activated for booking friends and family air tickets