Schools aren’t ABET accredited. Programs are ABET accredited. I know for sure Maine has three - PET, MET, MSE. Only the latter two are marine license track programs.
If next-level math intimidates you, I suggest going the MET route. Tech. Calculus II is as far as you’ll have to go to get through that program (ezpz). Upon completion, you’ll have your 3rd A/E license, an ABET accredited engineering technology degree, and will qualify to sit for the FE exam.
90% of the difficulty in completing the above is time management. You’re a grown ass person now you’d crush it. Good luck!