Given you have a finite amount of time, the relatively obvious answer is - this isn't a good idea.
Excel is made by Microsoft. Microsoft is strong in languages and tooling around languages. If there was something genuinely useful to add, they'd have done it.
Now, obviously you can't think like this about everything or you'd never do anything. But, you have finite time so pick something better, I'd say. Maybe pick an area where you have some deep insight. Or some area where the existing products stink. Excel is really freaking good given the large number of use cases they have to support.
Excel is made by Microsoft. Microsoft is strong in languages and tooling around languages. If there was something genuinely useful to add, they'd have done it.
Now, obviously you can't think like this about everything or you'd never do anything. But, you have finite time so pick something better, I'd say. Maybe pick an area where you have some deep insight. Or some area where the existing products stink. Excel is really freaking good given the large number of use cases they have to support.