Firstly, she is no longer a kid. She is 18.
Secondly, she is not thick. She was a pupil at Franska Skolan, a private school in central Stockholm, from 2010 to 2018, after which she transferred to Kringlaskolan, a school in Södertälje. In 2019 it was announced that she had completed the 9th grade (which is the completion of the lower secondary education) with excellent grades, garnering 14 A-grades and 3 B-grades (B-grades are reportedly in Swedish, home economics and physical education).