This pattern in an amigurumi from the Harry Potter “world” (Luna Lovegood). The doll is 24 cm - 9.45 inches (without hair) worked with a 2.5 mm crochet.
It is not a toy for young children (small parts / stuffing).
It is easy to make, perhaps not as a very first project.
Pattern language : French and English (US terms)
Any yarn is suitable for this doll.