As Jews everywhere prepare to have seders on their own because they can't join the family and friends for big seders hosted by others, a number of great resources are being offered which could be helpful learning opportunities for prospective converts.
Haggadot.com offers some helpful basic information: Passover 101
And as indicated by the website name, it also has many haggadot of all kinds that can be printed out: Featured Haggadot
The podcast "Unorthodox" says:
... we're launching a daily Zoom tutorial called Seder Academy at 4 p.m. Eastern each day. We’ll be offering ideas, recipes, and inspiration, and taking your questions about Passover prep in these strange times.
Join us for the first installment, Thursday, March 26 at 4 p.m. EDT, and every afternoon until Passover, at: bit.ly/tabletsederacademy