How to make and keep long grain organic brown rice tender
When reheating any kind of rice, you will need to add water to it (with white rice, just covering the container with a damp paper towel works). However, brown rice does not reheat well at all; and from personal experience it is exactly how you describe it. So what we do when we cook rice for our meals, is we throw it in the rice cooker as we shower and get ready for the day to limit moisture loss as over the course of a day or night in a fridge. 

However, when it comes to cooking it the first time, the easiest way is to use an actual rice cooker. The one I have has a separate setting for White, Brown (short and long grain) and steam (like for veggies). It was not expensive (like 40CAD). If you have a preference for the convenience of an Instapot, that would be my recommendation. You can add spices, herbs and other flavouring agents into it as well (just do it after you add the water and rice so it staying on top to remove when it's cooked, no one likes eating star anise by accident lol).