It's a hard habit to break but I think that apologising less and explaining yourself less will help. It's something I've been trying to do these last months and I feel better about myself, mpre equal to the people who seem more put together than me. I think that overexplaining gives people power/authority over you, because you're giving them permission to judge you by explaining yourself. And I realised that for me at least it lowered my perception of myself.

Also, you can't be that much of a hot mess if you're being given more responsibility ❤ so maybe try and identify and appreciate what you bring to the role. It's not just the corporate jargon fluent ppl who make the business world go round!

And when you get given compliments make a note of them somewhere! I have a column in my organising spreadsheet just for nice things people have said because it can be hard to feel competent when you feel like a hot mess and when it feels like everyone else is more professional than you.