Here are some free tools to use for LaTex editing:

https://www.overleaf.com/
https://www.codecogs.com/latex/eqneditor.php
https://www.mathcha.io/editor#
http://detexify.kirelabs.org/classify.html
http://texniccenter.sourceforge.net/configuration.html
https://ctan.org/

I’m not sure what they all do yet. I will explore each one in depth separately!