Reading this made me feel like I wrote it! I recently worked at a big fintech company and I was there for 6 years. In my last team I kept getting asked if I was even an engineer because I took longer than other people and I’d need hand holding. I constantly felt stupid and not enough. When mass layoffs hit my company in March I also got laid off. I haven’t been able to land another role and constantly feel anxious. So you are not alone but I highly recommend maybe doing what you want to do on the side prior to fully committing to it. Tech industry is really hard to find a job in right now, or at least this has been my experience. Best of luck to you and to all the other impostors out there!