The issue of provision and wealth has nothing to do with whether one is a believer or a disbeliever. This is something that Allah bestows on all His slaves, believers and disbelievers alike. Allah, may He be exalted, says (interpretation of the meaning):
“To each these as well as those We bestow from the Bounties of your Lord. And the Bounties of your Lord can never be forbidden”
If the disbelievers and non-Muslims receive ample provision, that does not mean that they are given an honoured status. And if a believer who affirms the Oneness of Allah receives little provision, that does not mean that he is humiliated and of low status. Rather all of that happens in accordance with His knowledge and wisdom. Allah, may He be exalted, says (interpretation of the meaning):
“As for man, when his Lord tries him by giving him honour and gifts, then he says (puffed up): ‘My Lord has honoured me.’
But when He tries him, by straitening his means of life, he says: ‘My Lord has humiliated me!’
Nay! But you treat not the orphans with kindness and generosity (i.e. you neither treat them well, nor give them their exact right of inheritance)!”
i.e., the matter is not as you think or as these people think.
What we warn you emphatically against is resorting to taking out that riba-based loan. Although riba may seem to bring increase, its consequences will lead to loss: Allah deprives usury (riba) of all blessing (cf. 2:276). So beware of going that route, O slave of Allah.
See also the answer to question no. 9054
We do not think that your circumstances justify taking the risk of starting new studies at your age; you may find work in that field or you may not.
Rather you should try once more, and a second and third time. Seek the help of Allah and do not feel helpless. Turn to your Lord at the time before dawn and in your prayers, and ask Him to relieve your distress and worry, and to increase your provision.
There is nothing wrong with trying to find work in another field, even if it is not your specialty, even if it is temporary work, and even if they dismiss you after that. Do not despair, O slave of Allah, for no one despairs of the mercy of his Lord except those who have gone astray.
There is nothing wrong with looking for someone who can recite ruqyah (incantations) for you among Ahl as-Sunnah, those who are religiously committed and righteous, although we think that what you have mentioned about witchcraft is unlikely.
May Allah make things easy for you and increase your provision and that of your family.
And Allah knows best.