First time ground combat mission. It’s really hard!

Until recently I've ignored the Odyssey ground combat, but with the rumors of Thargoid ground combat coming I decided to start preparing for it. As many tutorials have recommended, I first located and purchased all G3 suits and weapons. Some with mods included. I watched several tutorial videos on how to locate ground missions and how to complete them. The first mission I picked because it didn't sound to complicated. I just had to clear out a group of criminals from a settlement. The reward money wasn't very good. Only a few 100k, but I had to start somewhere.
So wearing my shiny new G3 Dominator suit I fly out to the settlement in my Krait MKII. Once I arrive there are four NPC ships that immediately attack. This seems ok, I figure I just need to clear the area of enemy vessels before landing. However, I quickly noticed that every time I destroyed an enemy ship another one would drop in and join the fight. This kept happening until I was forced to flee. Next, I tried landing outside of the enemy vessels range and approaching the settlement in an SRV. This didn't work either because as soon as the ships detected me, they started attacking both my SRV and my ship. I quickly dismissed my ship and started racing at full speed toward the settlement with the SRV. It didn't take long before I had to abandon the SRV as well once the hull got down to 15%. Thankfully once I was on-foot, the ships all went back to patrolling the area. Leaving my smoking SRV behind me, I started walking towards the settlement…and walking…and walking. Wow being on-foot is really slow! It took like 5-10 minutes of walking to get there. I don't see anyone at first, but as I'm walking around
the perimeter wall someone says they hear something and will check it out. A few seconds later a dude pops out right in front of me from around a wall. I know from the tutorials I've seen that you have to take his shield down first with an energy weapon, and then switch to a kinetic weapon. This works perfectly, but as soon as his shield goes down he runs back behind the wall. I follow him hoping to get him before his shield recharges, but as soon as I round the corner there's another guard. I don't know what weapon he was using, but I was dead in like 5 seconds. I think I got hit only two or three times.
Next I see a "Redeploy" screen. I'm assuming this will put me back somewhere outside the settlement so I can try again. Nope. The mission has failed because I died. I get sent back to my ship in orbit. I just spent over an hour on this mission, and only got something like 10 seconds of ground combat experience. There's got to be a better way.