A police officer and an Officer in the military are in no way related as job functions. You could be the officer in charge of meals in the military, for example...
So, my point is, you should not evaluate your decision by involving these to desires of yours. Evaluate them independently. Perhaps you could explain more as to what you mean by, "being slotted for OCS." Are you just now entering the military, or are you currently enlisted with the intentions of going to OCS?
The military's reserve cadres still have to go through regular training. Usually, there is something almost every month, and at least a few weeks of training each year in the summer...
Honestly, I'm really having a hard time understanding why the ARMY still maintains a Reserve component when it has the ARNG. As it is, the only real difference between the two is in how the Dept of Defense has decided to organize the distribution of its many units. But that's about it.
The other branches more or less have reserve components only, and they all train on a schedule similar to the National Guard's. The neat thing about being in the reserve is that you still get to enjoy most of the benefits unique to civilian life....such as being a cop. You still should be able to attend OCS as a reservist without any issue.
I also guess I'm confused as to what you mean by a "real military life." What is a true military life, anyways? All you do is either train or deploy. In active duty, you are training all the time (well.....supposedly

..That's really not the case though in many situations..

)... As a reservists, you will train on a regular but not-time-weighty basis.