First off, you need to decide what course you are creating. Hint: start with a mini-course (for details on how to select one see (The procrastinator’s guide to launching an Online Course in 2020!)
Then you need to map out your course plan Freemind (https://sourceforge.net/projects/freemind/) is mind mapping software that can help you make sense of all those different topics.
Now you need to create the content for your cousre. Google docs is great but I use LibreOffice (https://www.libreoffice.org/) to do the bulk of my course creation. The word processor, LibreOffice Writer, is really simple to use and I can create PDFs straight from the toolbar. I find the presentation software, Impress, much easier to use than PowerPoint. I’ve used it for graphics in my videos, too. I can save files in many different formats, which makes things easy if I’m collaborating with somebody else. There are Windows, Mac and Linux versions.
DaVinci Resolve (https://www.blackmagicdesign.com/products/davinciresolve/). Believe it or not, major Hollywood studios use this free software to edit movies and TV shows! It looks a bit intimidating, but it’s actually easy to use when you know-how. There is a bit of a learning curve, so if you’re looking for something simpler try Video Pad (https://www.nchsoftware.com/videopad/index.html). Both apps have Windows and Mac versions.
Audacity (https://www.audacityteam.org/download/) is the sound recording and editing software I use for podcasts as well as for cleaning up the audio on my videos. Only a few years ago I was having to pay an audio facility a fortune to do what this app does for free. Windows, Mac and Linux versions available.
Camtasia (https://www.techsmith.com) is the leading product for screencapture videos. Not free, but you can use it unrestricted for 30 days — plenty of time to create your first course, launch it, and make enough money to purchase a license. Of course, if you have a mac you can just use SHIFT + COMMAND+5 and start to record!
With so many FREE tools available. There has never been a better time to pop your course cherry and start to make the world a better place by imparting your skills and knowledge to the waiting public!