Hey I Would like To Make Sure My Device Is Protected
As Far As My Bank Information
iPhone 11, iOS 13
See these security-related documents, especially the first two, for general information and for specific information related to your question.
If you think your Apple ID has been compromised https://support.apple.com/en-us/HT204145. From the link, among other things, Change your Apple ID password and choose a strong password when confronted with a possibly account compromising situation. And here is What to do after you change your Apple ID or password https://support.apple.com/en-us/HT204071
Security and your Apple ID https://support.apple.com/en-us/HT201303
iCloud security overview https://support.apple.com/en-us/HT202303
Ways to keep your information safe on Mac https://support.apple.com/en-gb/guide/mac-help/mh11402/mac
Using app-specific passwords https://support.apple.com/en-us/HT204397
Use Two-factor authentication for Apple ID https://support.apple.com/en-us/HT204915