Can't handwrite, any software alternative for math?

I haven't handwritten since 1997 and I now need to re-study mathematics from the very beginning for which I'm planning to use the material shared by OpenStax (https://openstax.org/subjects/math) with the GeoGebra tools (https://www.geogebra.org/). Is there any software application (preferably running under GNU/Linux, or Web-based) which I could use to work through the problems mentioned in the OpenStax curriculum? Essentially, a replacement for handwriting using pen/pencil and paper!