6'3" & throwing 84. You are definitely a D1 prospect over these next few years. I also really applaud you for taking the initiative on your recruiting path, that is great to see.
One way or another you are going to need to be seen by the college coaches, in person, before they will offer. Opinions differ re Camps, but in my opinion things have changed in terms of Camps being a viable part of recruiting and not just a money maker.
Another route you can take towards a D1, if you don't have any offers by August or Sept of 2020, is to consider going the Junior College route for a few years to develop more. With JUCOS you can arrange to just go & tryout while you are still in high school, at no cost. The rules are much more loose.