I would suggest a quest for London, where you can go to someone in the shade alley and get a questline for a break in to the gringot vaults. You would go to nearby shops and collect supplies such as a mask, gloves, and tools for the break-in.
Once you collected the tools you go into the bank and get teleported to a quest region. You have to sneak by next to some guards until you reach the minecart. Where you have to drive to a special vault. Once you arrive you will have to parkour over some rocks to get into the room where a harder mini boss is which is the protector of the vault.
Once you collected the tools you go into the bank and get teleported to a quest region. You have to sneak by next to some guards until you reach the minecart. Where you have to drive to a special vault. Once you arrive you will have to parkour over some rocks to get into the room where a harder mini boss is which is the protector of the vault.