Welcome to the Forum @Jack_Williams and thank you for reaching out!
At it currently stands, it is not possible to sort your My Tasks by multiple filters. I would highly encourage you to cast your vote and comment on an existing thread we have in the #productfeedback category: Sorting My Tasks by Project AND Due Date
Apologies for not being of a greater help on this matter Jack! Please let me know if there is anything else I can help you with!