I would push through if I were you, because I was in the exact same situation only a few months ago. I had wayyyy less experience than you, and took over most

I would push through if I were you, because I was in the exact same situation only a few months ago. I had wayyyy less experience than you, and took over most of the work for a react/typescript/node project that was MASSIVE compared to anything I had worked on before (static websites and small Django projects). I felt like I could cry and started having issues with heartburn for the first month, and even told my boss about 2 weeks in that was not qualified for the job. Thankfully, they told me that they knew that it would take a while, and encouraged me to stick with it. Even now, 7 months in, there are still so many things I'm learning, but I would really recommend pressing in to the job, (especially if your manager has the wisdom to see that it will take you a while to get up to speed), as after I had been there about 6 weeks things started to make a little more sense. Also, if it makes you feel any better, the stack overflow survey from 2018 shows that 44% of devs expect a new coworker with 4 years of experience to take one to three months to be productive (https://insights.stackoverflow.com/survey/2018/#work-how-long-do-developers-expect-new-coworkers-to-take-to-be-productive https://insights.stackoverflow.com/survey/2018/#work-how-lon...), so I think you have less to worry about than you think. I'd keep with it until and unless they make you leave!