Taking an interest bearing loan to buy a house

Q: I want to buy a house but I can't pay full, or get an Islamic mortgage because of my finacial situation. I am staying in a rented property, and now the time has come for me to get my son married and we need a bigger house. I wanted to rent a house, but the price is also high. I don't get a housing benefit. Can I buy a house with a non-Islamic mortgage and try my best to pay the mortgage as soon as I can?

Women's satr exposed in salaah

Q:

1. I now wear 2 khimars, 2 shalwars, 1 half-sleeve T-shirt underneath two kurtas, and a pair of gloves (and I try my best to tuck in the sleeves of the 2 kurtas into them) until the wrists because my clothes are thin and quite see-through. After wearing these clothes, I feel comfortable, Alhamdulillah, that the satr is not going to be seen.

My question now is that if a woman goes into sajdah and if she is wearing a see-through kurta (and no other shirt) and even though her khimar (which reaches almost until her knee cap when she is standing) still covers her body during sajdah by draping around it but does not cover the kurta itself such that if someone (like an angel or a jinn) were to watch her from below the ground, they would see the kurta uncovered by the khimar but someone standing on the ground could not see anything underneath the khimar at all. Does this invalidate the prayer?

2. If two limbs are exposed during Salaah, each less than a quarter of its whole area, how can a woman know if it invalidated her prayer? What is the length she can measure to?

3. If a woman wears shalwar (which kind of shows her figure but is not figure-hugging like tights), then is her Namaz valid?

Man's "authority" over his wife

Q: When speaking of the qiwamah of a man over his wife (i.e. his “authority” over her), we need to realize that this is a burden and a responsibility, not an honour and favour. The man’s responsibility is not restricted to maintaining his wife financially, housing, feeding, etc. He is also responsible for looking after her emotional, spiritual and physical needs. Allah’s command is to treat wives kindly and on a footing of equity and what is acceptable. وعاشروهن. Al-qiwamah is in no way meant to turn the husband into some sort of dictator who thinks he is a master who orders and forbids and should be obeyed unrestrictedly. There are so many nuances to look at when we look at these issues. One such nuance is that Allah did not say that males are qawwam over women; rather, He said “men” are qawwam. This is something we need need to think about and ponder; for how many males are not really “men”.

Is this above writing correct? If I feel like for my husband's thinking attitude is harming my imaan, I often think bad of Islam that it favors men over women should I leave him?

Wishing for one's non-Muslim girlfriend to accept Islam

Q: There is a Hindu girl that I like and I wish to marry her in the future (we both are 16 years old) as I don't want to have any haraam relationship with her. Is there anything I can do to inspire her to embrace Islam with her heart, mind and soul so I can marry her?

I genuinely care for her and I don't want her to go to hell because she is a very good, generous and honest girl. Please guide me in this matter. I can take things slow and cautiously with her if I can inspire her to embrace Islam.