You cannot reformat an L-series, so your stuck with whatever it is loaded with. Stay with a late J-series or K-series.
NAV is updated either thru Ford if the APIM is originally equipped in the vehicle (ESN licensing) or in this case thru reformat of the APIM.
Sync 2 settings are mostly not applicable to Sync 3, a lot of folks make this mistake. The best way to start is to be on a community like this for help, and to find a vehicle similar to yours but equipped with Sync 3, like a later model year. Get the VIN of that vehicle and look up the asbuilt data at Select Country - FordServiceInfo.Com. This will give you a close match and minimize the programming.
Ford does make USB hubs with A and C connectors. Purchase your hub thru a Ford service dealer or reputable representative. Media Hub, CarPlay Compatible - 2015-2020 Ford/Lincoln - SYNC 3 - Ford / Information - CyanLabs Official Community
GPS antennas:
GPS Antennas for Sync 3 Retrofits - Ford / Information - CyanLabs Official Community
GPS open circuit error after MFT to SYNC3 upgrade solution? - Ford / Discussion - CyanLabs Official Community