Yes, there is a section to practice spells and a section for duelling with other members. If you duel you can earn house points.
You can gain access to more spells on Pottermore by buying school books as they become available. You buy the books from Flourish and Blotts in Diagon Alley. You can then use them in duelling.
You have to click on the spells coming from the wands. They are identified by the colours.
If you got the free version of the app, you have to pay for the extra spells, but if you got the version that you have to pay for, you unlock new ones when you master spells, except for the unforgivable curses (Crucio, Impirio, and avada kedavra) :)
you can cast spells by click on the mouse.
Spells said to be cast by the great wizard Merlin.
Cast spells
You cannot. The ability to cast spells is a fantasy.
Yes.
cast spells?
Pottermore is British. It is in the GMT timezone.
Pottermore does not have a search engine.
Yes, red spells cost 1 less to cast in this game.