Update API and get historical data

I need to download/install interactive brokers and their python API, get that historical data for the ISIN's, develop a pipeline to get their current data in real time as well.
However, their data only goes back two years, so I also need to figure out a way to get the historical data for the stocks we care about now (our universe will consist of the S&P 500). So, we can use Bloomberg for that, and rather than get a subscription, since historical data isn't changing, we can just pull it once and store it somewhere for our app to use... possibly in our DB...?