Can I change my contract's MOS from enlisted to officer candidate if I haven't shipped out yet?

Hello everybody. Back in October, I signed an enlistment contract in the US Army Reserves. Joining the army was an easy decision as I knew I wanted to follow my grandfather's footsteps, yet since I didn't know much about the inner workings and considerations of choosing an MOS and difference in career paths I foolishly just relied on my recruiter. But, as my appointment at MEPS was approaching, I had family members approach me about holding off because I was set to graduate with my undergraduate degree in December 2020 and it would make more sense for me to enlist as an officer candidate and go straight to OCS after BCT. When I expressed this interest to my recruiter, he brought in the state's recruiting CO and I was kind of pressured into the enlisted MOS we had planned on. I haven't thought a lot about it since then, but as my ship date to BCT quickly approaches in late May I have been having serious regrets about my decision. I still want to serve, but I want to make sure I do what's best for me. If I stay on track with my academics, I would be graduating in December 2020 and would be eligible to apply directly to OCS. But, under the contract I'm currently signed on as just enlisted, my graduation is pushed to May 2021 because I'd be out for BCT/AIT from May thru December and now charted path to become an officer in the future. Since I haven't shipped out yet, could I still change my contract? If I back out of this contract, will this negatively affect me when I try to apply directly to OCS when I graduate?