Mechanic
Vendor
The shop where you spend cash on gear and vehicles.
The vendor is where you spend Cash each life, on your Loadout, on Vehicles, and on the FOB and Hammers for the Support career. Prices are tuned between updates, so what is worth buying shifts, see the patch notes and the money guide. Remember the roughly 90% refund on a clean death.
Know the wiki. Now play the game.
AE Gaming runs organised WARDOGS every night with free comms, a planning map and a base builder. Reading is half of it, the other half is a squad.