There's also NAIA baseball which most people consider below the D3 level. I started at a D1, went to Juco, and now am headed to a national condending D2. My advice would be to start sending out emails and video of yourself as soon as you can.
Dont put it off at all, establish contact and get things going early. My senior year, I sent videos out ight before the end of my first semester....pretty late. I got a lot of response, but alot of schools were out of money or pretty set with arms.
Players get drafted out of all levels of college ball...as long as your playing and getting better, your in good shape. Another big thing I would recommend is to go where you know you are wanted. This ensures more playing time and opportunity, which is essential in getting exposure.
Best of luck. If you have any questions about what to put in the video or anything let me know I've gone through the whole recruiting thing 3 times now, so I could give u some pointers.