You're getting good advice...
Thanks… in between packing and property development, I’ll I do is watch videos. More than a few friends have come over to help with ins and outs associated with rv. It’s a learning process and I know I’ll make mistakes, but just wanted quality advice.
You're getting good advice. Take it easy and take care of the high priority items first. Don't worry about everything at once.
Your immediate need is electricity. Even great batteries, fully charged, will only last a handful of days. Getting power to your site is a number one priority. Once you have power there, a single so-called "marine" or "dual-purpose" battery is sufficient. No need to splurge on lithium unless you plan to disconnect from power for several days.
Next object is water. You can live off bottled water for an extended period of time, but running water is nice. Does your construction site have water? Or have you found a service that will bring water to your site?
You will learn that your water heater is tiny, likely 6 gallons. Compare this to a house with a 50 gallon unit, or an apartment with 35. Expect to take "navy showers." Run the water until its warm, get wet quickly, and turn it off. Soap up, then turn the water back on to rinse. Do this right, and you will be completely rinsed off just as you run out of hot water.
When you use water for washing or toilet, you create waste water. There are two kinds. The sinks drain into the "gray water" tank. The toilet drains into the "black water" tank. You should have plans to get the tanks emptied. Ideally there will be a sewage connection on your site. You will learn that it's a bad idea to leave the drain valves open. Better to let the tanks fill and then open the valves to drain them. Empty the black tank first, then the gray tank (to rinse the drain hose. Then, when the valves are closed again, run some water into the black tank before using the toilet to avoid a "pyramid of poop." What is your plan for sewage?
You will likely use propane for the range and water heater and furnace. Your trailer probably has two 20 lb. propane canisters, with an auto-changeover regulator that switches from one to the other when the first one empties. These tanks weigh about 37 lbs. when full. If you're fit, you should be able to wrestle your tanks to Walmart or Lowes or many grocery store and swap them for full tanks. Cheaper to let Costco refill them for you.
One last comment, because you mentioned the awning. Don't leave it extended if high winds are expected, or if you are leaving for an extended period. When you do extend it, don't set it perfectly level. Make sure one end is lower than the other. If you leave it even, a pool of water can form in the center, so heavy that it breaks or tears something. If you leave it with one end low, a valley forms in the center and all the water runs off through the valley.
Sorry this is long--there's a lot to learn.