It was the same for me when I started my internship and now transitioned to full time. I found [Ashley Weston](https://ashleyweston.com/), who is according to herself a celebrity mens' wear stylist. She has a good set of essentials which I basically all bought (except for the suits due to monetary reasons) and I think this has really helped me.

I am not affiliated with her or whatever, just follow her advice myself and enjoy her content.