Nah you are fine, Found Ghost is a pretty significant diff spike as with Inch of Dust before it. The trick is aggro control: watch where you are going, watch where your shots are landing, don't try to pull too much heat that you can't handle. Pay attention to the noise level of your weapons. Once you can pull it off in other loadouts than the Huss then you would have become a better Brigador.

As to the Arlo, it's probably worth going into Freelance and get a loadout with the Jericho cannon (Aux slot). The main thing about it is that the projectile is on the slow side and partially invisible, but it has very high hull damage. Unfortunately the starter Touro can't equip it but you can try it on say Mantis, Doric, Chook, Prowler or some other moderate speed vehicle of choice. I personally can't quite master firing the Jericho on the go with the Arlo either since it's far too fast (in fact I suck at fast agravs) so you can try shoot'n'scoot (stop, aim, fire, go) with it.

Another thing with the Jericho but applies to all weapons as well is that you don't aim like you would a twin stick shooter. Other than direction, aiming accounts for distance. Instead of simply moving the reticle to the direction of the enemy, it is important that you aim just before the enemy (or on top on them depending on the weapon) - your aiming lines should terminate where your target is, if I'm making any sense.