Teaching psych undergrad nursing at home instead of in the hospital and need help.

Hello everyone I am currently going to be teaching at home for the next 4 months and need suggestions. I was going to use Zoom but suggestions on here are saying no. What I am looking for.

\-Video chat software for a size of 20 students

\-text chat

\-Looking for a software that I can implement drawing and vectors into teaching? (Having premade ones made and if questions are asked I can draw.)