Best Data Base for Beginners

I've been working on a web scraping project involving the data mining of multiple websites. I stored all of that data into a csv file using pandas. I have a feeling that such way of storing data isn't quite safe, specially since the csv files are stored in my local machine. What are good data bases for beginners? I've never used one and do not how they work, however, I am quite proficient with data tabulation, analysis, and organization. The goal of this data is to be used along a webpage that will eventually will be deployed for users, however, in the meantime, I want to keep that data secured.