After you landed in the Airport you can take a bus number 109 (yellow) bus fair $1 otherwise you can take a taxi (less than $10) to your hotel/hostel.
We have Uber in Vietnam but there are some reason that we can’t book an Uber from the Airport but you can get Uber from your Hotel to the Airport and around the city.
You could look for a simcard which has 3G,4G within $7 (9GB) 5$ (3GB).
If you are looking for the best exchange money rate here is one of the best place that we would love to recommend you.
Address: Ha Tam Gold Shop 02 Nguyen An Ninh street, Ben Thanh Ward, district 1, HCMC.