Having done both web and gl ux for a living, I think you might be overestimating the complexity of a gl implementation and underestimating the complexity of meeting the same specs using a web implementation.
While not quite the same thing, if you have the time, dip your toes into some immediate mode UI, for example imgui. It is enjoyable not a grind.
As a Canadian, I can confirm 12 months is not enough let alone 6 weeks… I am deeply saddened at the thought of mothers having to go back after so little time