Will I get loose skin?

I’m 17 1/4 years old Male. I’m 230 lbs 5’11. I’m currently weight lifting 5x a week. With 50 pushups and sit-ups daily. 30 min bike ride daily and 30 min walk daily. I’m on 1800 calories right now and on a high protein moderate to low carb diet since I’m T1D. This is about a 800-100 calorie deficit. Is this too aggressive and will I get loose skin if I keep this up. (My starting weight was 235). I also have a couple of stretch marks on love handles, under armpits and in the groin area but those are very unnoticeable and patchy. However the prominent ones are right below my belly button still not very large though. I’m just super worried. Should I switch the deficit halfway through the weight loss or now? And I’m so confused how I even got these stretch marks cuz I’ve been the same weight for months prior to working out and starting this journey they just showed up out of the blue.