Regardless of the factors above, there will be some costs that you'll need to prepare for no matter your destination. Some different kinds of costs to expect include:
Academic Program:
This might be the first time you'll have to manage your money. Budgeting is an important thing to do as you plan your Exchange and while you are away. It can be easy to get carried away and get FOMO, so you jump on the last-minute trip to Croatia or Mexico in the mid-semester break... but does that fit in with your budget? Or will it mean that you have to eat noodles for dinner every night for the rest of the semester?
Having a set budget in place will help you stay on track and manage your expenses and finances while you are overseas.
And remember to keep some buffer money for unexpected costs- flight disruptions, unexpected illness or incidents overseas, losing or damaging your phone, etc. While insurance may likely cover a lot of these things, you'll need to pay for them upfront until you can make a claim.
Practice preparing a budget before you leave.
Open a bank account in your host destination