Amazon Joining and Imposter syndrome

A little background: I started coding properly from Nov’21, started with C++ and gradually leveled up and began full fledged problem solving in vacations as there was nothing else to do exams were over. I did problem solving with the intent on fetching a job offer. Overall during my entire preparation I solved more or less 450 problems (leetcode & others). Then came the placement session. I somehow secured two offers on the same day and the TPO office decided to give my name only for a single company which was Amazon. Present: As offers get rescinded to Jan’24. I somehow got an off-campus offer in a PSU where I am currently working. Here I am working in s/w development team, and till now: 1. I have developed two modules (by looking at already implemented code and figuring out how it can be used in my modules). 2. Some generic classes to format all reports generated in the entire project. (object, constructor and methods, fairly easy although understanding the requirement was the tough part). The problem is that I always take time to figure out the things and I have this solid impostor syndrome. I take time in understanding the requirements and how to get started and what to do next. This may be due to the fact that I didn’t get converted into full time from my internship (In retrospect this was seriously my fault, I was too much occupied with my final year thesis, the project itself was too hard and complicated and the mentor was mostly busy and no-one else in the team of entry level from whom I could discuss more, also other college issues). Sometimes I think that I could have done it better. Dilemma: Now as my joining date is coming close I’m super confused and nervous (given the present scenario) a bit scared to leave the current job and join Amzn or not. I am starting to feel that I am not prepared and have not solved any problem for the past 5 months. Read some reviews regarding Amzn and it all seems that the pressure is going to be too much and I'm not sure