I agree with some other comments here that $100 won’t get you what you’re hoping for.
A better upgrade would be to start saving for a good handheld burr grinder (like an 1zpresso model) to replace the blade grinder. Your French Press and AeroPress will likely taste notably better!
If you do want to venture into good espresso, as someone else mentioned, start looking into Cafelat Robot or Flair. Both can make fantastic espresso at higher quality than semi-automatic machines of the same price point and require much less upkeep. But, for any espresso, you will need more gear (scale, tamper, vessels, etc.) which adds to the price. And all espresso machines will massively benefit from a good grinder.
Good luck!
I also ordered a kit!