Dr J. Vernon McGee's 5 year program of "Thru the Bible" radio broadcast is available for free at ttb.org.
It's available in a number of languages.
You can get an app for your phone where you can listen to any book of the Bible that you want. You'll hear the 30 minute daily broadcasts.
I prefer the Canadian site where you can download the entire 5 year program to your computer for free. I did that. I tend to listen about 20 minutes a day. You can find it here:
I try to listen five days a week. I get a lot out of it. He doesn't dodge the difficult verses either. It's very detailed. If you listen to all of Romans it takes 12 hours and 44 minutes.
Dr McGee was born in 1904 and died in 1988. What he said then is still relevant today.