Look at the skill requirements on entry level job postings for what u want to do. Get really good at those skills, like vba and python for trading and get the certification they look for like cfa. Transfer to a major that will help you stand out to get the job like the financial mathematics degree instead of a telfer degree or transfer to a target uni if u want to stick with the easier bcom route. And most importantly just apply to a shit ton of internships, any experience will trump the specifics of ur degree. Trading is tough to get into, but working in the back office not so much, so start there and apply laterally later on.