Don’t give up Blender, as there are many studio companies taking an increasing interest in Blender. Sure, many use Maya and Studio 3D Max, but some of their artists are switching over to Blender. Some have previously used Maya or 3ds Max for YEARS and are now using Blender. Companies like seeing their artists taking keen interest in latest affordable softwares, whatever that can help beat tight deadlines, save time and labour in production, keep down overheads, etc. Knowledge in Blender for your resume or CV would be very advantageous.
While you are a student, do vary your interests in softwares and also in art apps. Get interested in not just the big-name softwares, also their rivals. Some upcoming rivals are getting better and more affordable.
For planning 3D models ahead, I always rough out my ideas first on iPad or Samsung Galaxy Note. I use Samsung Note 10.1 for Autodesk Sketchbook pro and iPad for Artrage and Procreate. I use Samsung NOTE (not Samsung Tab) for mostly sketching or inking because of it fine-tipped stylus that works like a Wacom, but you can’t get Artrage or Procreate on Android - it is a pity. iPad doesn’t have fine-tipped stylus, but I use it for painting.