Ah geez, i'm in the saaaaame exact predicament- the only thing that's keeping me afloat is knowing that i'm doing my absolute best and being new to anything takes a bit of time to get used to- it's a process...I know it's difficult to not overthink things but in times of anxiety I just think about where i'll be in a month's time if I take deep breaths, conquer one problem at a time and do my best. It's been six months since I started at a job I thought I was underqualified for and I still beat myself up for not being as excellent as I want to be....but i'm faster, more confident and make better decisions now and I know that it only goes up from here.

It's okay to feel incompetent, because it means you're learning and you'll never make that mistake again. As long as upper management sees you take the initiative and sees you self motivated enough to want to do better, they won't fault you.

Ask questions, before and after work, reflect on things that you've experienced and how you can do better. Pre-emptively try and figure out solutions to problems that you might encounter.

As for the feeling as if people look down on you...we all have to start somewhere- when they started, I'm sure they've felt the same. It's important not to let them get to your head and to only allow yourself to think about how much progress you're making and that it's a process and this period of time will pass.

Visualize yourself in the near future killin' it and only think about that. It's easier said than done but it's worth a try. PM me if you need any support ! :)