Route back to Finance

Hi All - I started my career in B4 Audit and worked hard to get into a PE Portfolio Management (Some value creation, mostly monitoring, reporting and valuations) role over the course of 5 years and had strong performance throughout. I left my role at the end of 2024 to launch a start-up. I had been my dream for my whole life do this and I went in full of excitement and anticipation. 6 months in I had a total crisis of confidence on the start-up and my head-space switched to 'OMG you worked so hard to get into a brilliant position in finance and you've blown it away for nothing'. I have spent the last month frantically trying to plan how best I can get back into finance and spin this CV gap as something reasonable. Any recommendations?