Wali for a Muslim who has no Muslim family members

Q: I was born in a Hindu family and later reverted to Islam. My family had broken all relation with me after knowing it. So I live alone and work in a company. I have received marriage proposal from a Muslim man whom I know for few years. I want to marry him but as I know, a wali is required for a woman to marry. Kindly inform me how to get married in this situation. Do I need to inform my family that I am getting married. They are already very angry after I accepted Islam. I fear that they would harm me.

Homosexual feelings

Q: I am a Muslim but I suffer from homosexual feelings. As per advice from many renowned scholars, I got married. I never disclosed this to my wife before marriage. I still have homosexual feelings. So I kept having these thoughts that I have deceived my wife. So I disclosed it to her and she is ok with it as she loves me a lot and I want to stay with her too. I would like to know if this marriage is valid in the eyes of Allah since I hid this truth from her. 

Marrying a divorced woman

Q: I want to marry a divorced girl and she has one daughter also. After marriage her parents will adopt the kid. As per that girl, her family will not disclose anything in front of my family. So, If I am hiding her background from my parents and my family, will this act be bad or good according to shariah as my intention is nikah and reward only.