I studied Economics and had some statistics knowledge. I also had several years of experience as a data analyst.
Every day I have about 1~1.5 hours. My new job starts in 1.5 months.
What is the best action I should take?
BTW, I don't mind paying for good content.
They are likely to have relevant recommendations.
And talking to your (future) boss is a useful habit to develop.
Good luck.