I have an ipad pro that I used in my predental post bacc program. I love the ipad+pencil+notability. Notability is an amazing app and the developers are always improving it. I would recommend it. I have not used blackboard with it, however. I have the 12.9 inch one because I wanted a larger screen, but others had the 10.5 inch and it worked fine.
I love being able to write ontop of lecture notes and fill out any paperwork with notability instead of printing it out, filling it out, then scanning it. It also saves a ton of paper because again I don’t have to print anything out.
If you have any other questions let me know. I used my ipad over the past year roughly 6-8 hours a day so I am pretty familiar with everything.