Sending one's daughter for Qur'an lessons

Q: I asked one Imaam saheb to start the quran e paak for my 5 year old daughter and he was ready to do it at his residence, but when I told my wife
she said that let her continue at our neighbour's because she is already reading it there. I am very much embarrassed because I already promised molvi saheb that I will send her. I am feeling regret and sinful if I don't send her. Should I explain to hafiz sahab about this or I have to fulfil my promise and send her  any way? Is this a sinful Act. Because a Muslim has to fulfil his Promise in any circumstances. Please advice me on this.

Makrooh-e-Tahrimi

Q:

  1. Is it a sin to commit any act of makrooh tahreemee. How serious is it. Please give me reference from Arabic books like shami etc.
  2. After how long does a makrooh tahreemee become haraam?

Shaitaan

Q: My question is that who was shaytan before be was sent down from heaven? Was he a jinn? Or an angel? What is the difference between iblis and shaytan?