Your SMC version is definitely old.
The firmware list gives the updated numbers.
But yours is a MacBook not the pro I guess.
Perhaps the listing is wrong area of the world.. try checking for download from other places.
Anyway you can still try the reset.. as that is worthwhile doing.. no luck.. well you need a new laptop!! 😝
It is 8 years old after all.
Tesserax mentioned USB stick.. The other better method is ethernet. If the hotspot doesn't have ethernet.. I know all the cheap ones are wireless only but check if ethernet one is available for reasonable price.
Another alternative..
You can buy a wireless bridge. A very cheap low end TP-Link N wireless router will often work fine for this job.. just make sure it supports wireless bridge.. you plug laptop to the wireless bridge via ethernet and you then connect the bridge to your hotspot by wireless.. the bridge takes wireless connection to ethernet connection.
An airport express can also do this.. but if you need to buy it.. then it is a lot more expensive than the bottom end TP-Link / Tenda / Edimax etc. Whatever cheap brand wireless routers you can buy in your local market.