I am interested if Thief is able to open any door in Silmaria's town or maybe door next to Nawar at night. Is ferrari's house the only building that you can get in to steal something? Besides that journey with Elsa and the bank.

90% of the doors in town have magical locks and/or are barred so that they can't be opened by picking or by the open spell.

There's also the building next to Ferrari's that you can break into.