if you are moving to android, get a XP PEN MAGIC DRAWING PAD. right now, it is the best for artists. cus it was built for artwork.
as for software
INFINITE PAINTER MEDIBANG KRITA SKETCHBOOK PRO
with those programs you are more than ready to work, STAY AWAY FROM CLIP STUDIO PAINT ON ANDROID, IT IS HORRIBLE, IT LAGS, ALWAYS SENDS MEMORY WARNING NO MATTER HOW MUCH SPACE AND RAM YOU HAVE, IT BECAME ADOBE PHOTOSHOP IN TERMS OF RESOURCES VAMPIRIZING.
i wish i could afford an ipad, lol if you are moving to android, get a XP PEN MAGIC DRAWING PAD. r