Investing in courses

Hello, 

Would you all recommend investing in the WSO elite package or any other courses if you have a limited finance working background and are trying to break into IB? For those of you that have taken the courses, do you feel that they were worth it and benefited you? 

Also does one of the courses is "Excel Modeling Course", I am not an expert in excel, would this course help me with the functions of excel outside of modeling as well, or should I learn more about the basics excel before enrolling in this course. Any advice would be greatly appreciated. Thanks everyone.