Praise be to Allah.
Firstly:Who has guided you to Islam. This is a great blessing that cannot be matched by any other blessing on earth.
Undoubtedly the committed Muslim who is new in Islam will face some difficulties and problems, especially when they come from a way of life which has to be changed when one enters Islam. As a result, the new Muslim may face some difficulties with his family and the society in which he lives.
The new Muslim must look for committed and righteous friends who can help him, teach him and give him advice so that he will not be affected by the atmosphere around him, and so that the Shaytaan or bad friends cannot make him slip or go back to his former ways.
I advise this Muslim sister to fear Allaah and to wear proper Islamic hijab. She may face some difficulties but Allaah will help her and will protect her if He knows that she has a sincere and pure intention.
I advise her not to go to university because that will lead her to doing some things that are forbidden in sharee’ah, such as dealing with riba (interest) – as mentioned in the question – or taking off her hijab or mixing freely with men.
I advise her to look for a Muslim husband who will keep her chaste and under whose protection she can live, as that Muslim taxi driver mentioned to her. She should seek the help of Allaah to achieve that. And she should strive to learn Islam so that she can call others to Allaah and save whoever she can among her family, relatives and society from dying in shirk. This is the best and most important of deeds. Allaah says (interpretation of the meaning):
“And who is better in speech than he who [says: ‘My Lord is Allaah (believes in His Oneness),’ and then stands firm (acts upon His Order), and] invites (men) to Allaah’s (Islamic Monotheism), and does righteous deeds, and says: ‘I am one of the Muslims’”
I ask Allaah to make you steadfast in Islam and to guide your family.
And Allaah knows best.