Holding a pre-seder before the real seder in the era of Corona

Hello Rabbi.
Since there is a commandment to hold the Seder in each person’s home, and since my mother will be left alone, I wanted to make sure there was a halachic problem with holding the Seder before the holiday via video call (Zoom) when we only read the Haggadah without mentioning the name of God or reciting the blessings and without eating matzah/a table of offerings, etc.
Another reason I see for having something like this is for educational reasons for children.
If not, could I, as an individual, go through the Haggadah at noon today before nightfall? (There are editors who do this) and if so, what is the difference between the cases?
Thank you very much.