Procedure to wear Gomedh ratna and the appropriate hand which finger with time for maximum benefits

There is a lot of confusion about Hessonite in different sites. I am a lady going through divorce case which has been going on from the last 2 years.I am having severe issues related to emotional health, frustrations, anger, financial crisis and future worries regarding profession. I consulted an astrologer who asked me to wear 4ct. Gomedh ratna in little finger. But in web-sites,they say middle finger and at least 7ct; some say left hand for women and some say in working hand; some say time early morning some say after sunset; and many such things. Please clarify my doubts. and give me the detailed procedure of offering the puja to the ring for maximum benefits. Also give me the finger and hand details so that I give the jeweller for making the ring for correct size.