Where can I study what makes a job halal or not? Like working in a company selling products or services to alcohol or other haram companies. I don't want to get into a job and then have to leave if I learn afterwards it is haram because I didnt study it before. (I live in the west)

Ustadh AbdulAziz al-Haqqan

We have 3 courses on transactions that you can find and start watching in level 2 even if you did not finish level 1.