Transaction Banking to IBD?

Hello, I'm a sophomore who was offered an internship at GS's transaction banking division. I was wondering what the possibility of me internally transferring the next year to Goldman's investment banking division. Based on my knowledge, internal transfers get past the "fit" aspect of the interview, but still have to undergo technical interviews. I also understand that transferring into IBD can be difficult if you're in finance or operations, but since transaction banking is within the IBD division, how likely is a transfer attempt. Regardless of my ability to internally transfer, I still want to intern at the firm for my sophomore summer, but I'd like some insight to see if I should seriously apply to investment banking internships for my junior year. If internal transfer is possible, I'd likely only apply to a few other boutique firms that are on Goldman's level.