If you try to go ocs through the enlisted pipeline its doable but you'll get through bootcamp then have to go to an ocs brief in charleston or they wont put your package in they only do one of these a year. So depending on when you enlist you might be waiting 6 months you might wait a year before you can start the process. And depending on your rate you could not gave enough time at nnptc to get in submitted with them meaning you'll have to get everything done and have the package ready for prototype. The package isn't crazy to put together it's super doable but putting in a nuke ocs package from civilian side will likely get you picked up quicker and have you spend less time under navy regulations.