There are many great teachers available on the web who are able to open the Bible to us. And most of their teaching is free. These are the teachers online I trust and read and listen to.
https://www.ligonier.org
Ligonier is filled with tons of great materials. They do have some things that would be good for beginners, but I would have to say most of the material is for those who want to really dig in.
https://renewingyourmind.org
Renewing Your Mind is a daily podcast that features great teaching by the fellows at Ligonier.
https://www.desiringgod.org
Desiring God has great teaching by John Piper. There are audios, videos, and articles/blogs on the site. His “Look at the Book” gives wonderful examples of a powerful way to study single verses and short passages.
https://afr.net
American Family Radio has a treasure trove of great resources on a wide variety of topics.
My favorite teachers I look up on youtube and other such sites are:
R. C. Sproul – he makes the most difficult subjects easy to understand.
Alistair Begg – a powerful preacher/teacher.
Derek Thomas – a powerful preacher/teacher.
Sinclair Ferguson – a powerful preacher/teacher.
W. Robert Godfrey – an excellent teacher.
Albert Mohler – a powerful preacher/teacher who has a daily briefing on how to view what is happening in the world through Christian understanding.
Martin Iles – for perspectives on how Christians can look at what is happening in the world
Faith Gym 