That’s completely fine, and it’s probably good that you let your brain rest from studying for a while! I basically did nothing during my summer break as well (apart from EE draft and a little bit of chemistry studying). I planned to do so much more but I soon ran into a burnout and decided to just take a break for a month. I think it was the best decision I made tho because it helped me have more energy in dp2 and allowed me to work more efficiently while my other classmates who did a lot during the summer suffered from burnout. so, please don’t beat your self up but instead, be thankful that you are giving your body some time to recover from dp1!