Lack of Direction Post-Recruiting

For the last 1.5 years of my life, everything I've done has been in service of getting an offer in IB/PE. I accepted an offer at my dream PE shop a little over a month ago, but after the high of achieving that long-term goal has started to wear off, I have no idea of what to do with myself. 

I want to preface this by saying how lucky I am to be in this position and that this is a problem I am grateful to have to deal with. I come from a non-target school and never thought I would place as well (or as early) as I did. I would have killed to be in the position I am two months ago, but now that I'm here I don't know what's next.

I'm a very goal-oriented person as many people here are, so I'm asking for advice on what I can do to make something of my remaining 2.25 years in school. I spent the first two weeks after getting the offer drinking and going out with friends nearly every night, not because I even enjoyed it, but simply because that's what I have been having to sacrifice to focus on recruiting. This got old quickly and now most of my day is spent doom scrolling or watching TV. Working towards something like a job in PE gave me purpose. I've felt the best I ever have mentally and physically over the last two years, and don't want to fall back on old bad habits.

Maybe I'm crazy and nobody else ever felt this way after accepting their offer, but when I hit the desk and free time becomes a thing of the past, I don't want to look back on my last two years of school as something I completely wasted. I wouldn't trade where I am now for anything, but I would really appreciate any advice. Thanks.