Mily, I have a few thoughts to add to the other replies. The "whole money exchange situation" is not too difficult. Here's a step-by-step guide that might help.
As I recall from another post, you're traveling to Spain. I'd suggest that you contact your Bank and obtain about €50 or so for use during the trip. That way you'll have some funds to buy a meal or whatever until you get organized.
Take at least two ATM Cards, preferably on different accounts. That way you'll have a "backup" if there's a problem with one of the cards. Note that your funds must be in a chequing account with a four-number PIN.
Notify your Bank that you'll be traveling in Europe, and provide them with the dates of your trip. It would also be a good idea to review your daily withdrawal rate at that time, keeping in mind that any withdrawals in Europe will include foreign currency exchange fees.
I don't normally leave all of my travel funds in the account that is accessed by the ATM card. I leave a limited amount there to begin with and then transfer funds from other accounts as needed. That way if the card is stolen, the thieves will only get a small amount of money. I transfer using a Cell Phone, but if you have a trusted relative, they could handle this for you.
It would be a good idea to take at least one credit card also, in case of "emergencies" or other unexpected circumstances.
I can't recall if I suggested this before, but I'd highly recommend that you read Europe Through The Back Door before your go, as it provides lots of information and covers the money aspect really well.
Hope this helps. Happy travels!