The Insight Meditation Center in Redwood City, California, grew up around Gil Fronsdal. Monday through Friday @ 10am EDT they offer a live stream on YouTube. (Remember all the times on their calendar are Pacific time zone.) Check out the IMC YouTube channel.
The Issue at Hand is an easy-to-read introduction to mindfulness practice. I wrote about it here.
Unhindered is perhaps the most natural next book to read. Here's an alternate form, a six session class with PDFs of the chapters.
Look around the website (go through the main menu items) to appreciate what a wide and deep resource IMC is. When I sat with them in the 1990's we met in a Quaker meeting house. Now they have their own meditation center, a retreat center, multiple teachers, a chaplaincy program, and far more, and they do it with no paid staff and no charge for the retreats.
You can also donate to support their work.