What are the things I need to do, and how can I develop myself to get a job? What is the ruling on working for Coca-Cola in the field of maintenance, given that it is an American company that supports the Zionists?

Self-development to gain experience involves consulting specialists in the job market and your field. Working in a non-Muslim company is permissible if the field is permissible, such as car maintenance. It is not prohibited if the company is owned by non-Muslims or if it employs those who fight them. For further information, one can refer to the fatwas related to economic boycotts.