I wish you the best of luck. You might need it!
In the future, I’d seriously consider a used Zero. If you’re patient, you can get good ones for seriously little money. There was one right here on EMF for $3,500 a couple weeks ago with a legit ~80 mile highway range, 6 kW charging, and very quick. I used to have a similar one with a smaller battery, and it was very dependable, much more than anything from Aliexpress / Alibaba. There’s simply no reason to roll the dice on a no-name, no-support overseas special when you can find such amazing deals on established electric brands right now.
I don’t know what you paid for that thing, but I’ll be that by the time you’ve upgraded it into something decent (if such a thing even proves possible), you’ll have spent almost as much money as a 2020-2022 Livewire, which has DC fast charging, almost 100 mile highway range, and claimed 0-60 in 3.0 seconds. You can get excellent Chinese gas bikes, and you can get excellent 125cc-equivalent electrics in the Chinese domestic market or places like Taiwan, but you should never import an electric powered two-wheeler. The chance of getting scammed is almost 100%.