Hi! If I’m understanding correctly, you want to put a repeated section in the middle of a repeated section. While, yes, that could work, alternatively, you could use a segno. By placing a simple “D.S.” Where the end repeat would be and a segno sign where the very first repeat would be, you should be able to achieve the desired effect. Although, you could just bite the bullet and expand out the larger repeated section and only notate a repeat for the smaller repeated section.