Answers to Quora Questions by Yair Davidiy
What can I do to impress the rabbi that he is going to accept me as a candidate for conversion? Should I learn Yiddish and Hebrew?
Some of the other answers had pertinent remarks. This is not my sphere but I have known several converts who went through the process and been friends with them before and after. I also know a few rabbis, as do most other observant Jews. First of all ONLY try an Orthodox Rabbi since their conversion is accepted by everyone. In many opinions (including my own) Orthodox Conversion is the only one which is valid.
Points of advice based on my own impressions:
If possible check out several Rabbis at one and the same time. Do not be afraid of letting any of them know that this is what you are doing. It could even work in your favor.
Learn Hebrew. This is very important and very useful. You will probably never regret it no matter what eventuates. Hebrew is a key despite what others may say.
Learn Yiddish if you can. It is worthwhile but should not have priority over Hebrew or Religious subjects. Yiddish is worthwhile in its own right. It can also be important socially and we all need people.
Go to as many classes on Judaism as you can. Classes given by Orthodox Jews should be preferred. Network with them. Jewish acquaintances, who are not Rabbis, can also often help in surprising ways. If you live near a synagogue attend services and learn to understand what is going on. Make friends if possible.
Keep trying. Make a good impression. Live clean, this shows on the person. Dress respectfully, act modestly, and speak as well and as honorably as you can. Together with all this, relax. People like you. Most Jews are likeable.
Be sure this is what you want. It is worthwhile but can be difficult. Many converts and potential converts go through trials and tribulations in their personal life. Have you considered the issues, e.g. family, marriage partners, employment, friends, daily observance, learning? At times Judaism may be a solution for some matters and a source of aggravation for others. Pray for guidance.