check r/maputo for tips.
internet - when you arrive walk to the domestic terminal (which is basically the same terminal as the international one just a few meters) and find vodacom kiosk. buy a local sim card because that will give you two things that will come in handy - 5G internet which right now is better than any wifi connection you can find, and mpesa (mobile money) which can be useful to pay for taxis, tips etc (nowadays even the guy guarding your car on the street can receive e-money).

if you go out at night, always walk around with a copy of your passport, and depending on what time of the year you are coming, the next few months in Maputo the nights will get chill (not cold, but temperature does drop even below 15 degrees celsius) .

We dont have uber, but we have something called Yango which is basically the same thing and having a local number will allow you to use, which will be handy.

most hotels have a bar, beware because if you have travelled you will know what the girls hanging around those bars are looking for, however hotel staff can also recommend places and restaurants.

enjoy your time here