-Wood
There are two types of wood "Wood" and "Green wood".
The easiest way to find is green wood, but it is not suitable for all crafts.
Regular wood can be obtained from dead and dry trees, as well as from heaps of logs.

-Glass fragments
Glass fragments can be obtained from glass jars (right click on the jar and press "scrap")

-Cloth
You need to craft "Yarp" (crafted from plant fiber), then put it in a fire and "fry" it.

-Metal pipes
Many people throw out the grill grate, but you can disassemble it and get a pipe.

-Metal scrap
Most metal items can be disassembled and scrapped.

-Skin, blood and fat
Fall from the bodies of killed animals (including a rabbit)

-Stone, sulfuric and iron ores
Obtained from the corresponding color of boulders. If a stone can be picked up from the ground, or just start to hammer any rock, then sulfur and iron must be extracted from boulders (for sulfur they are yellowish, and for iron they are darker, black-brown).

-Powder
In theory, you can craft from sulfur and coal, but for the entire time of the game, I never found a blueprint.
However, I knocked out a lot of gunpowder from zombies.

-Metal Plates are from airdrops.
-low grade metal is made in furnace.
-Stone, sulfuric and iron ores all make stuff in furnace (Needs stone mold for some stuff)

So far I have found 3 ways to get the guns (besides knocking out in pvp)
- Airdrop
- Knock out zombies (It is easiest to knock out from them)
- Knock out the key card from the robot (I do not know what it is called. If you tell me, I will be grateful)
Just keep in mind, it is very tenacious and deadly damaging, but extremely slow. It took me almost 400 rounds of mq16 to kill him. You need to act on the hit-and-run principle (insert the clip, run back to a safe distance, insert the clip again, etc.)
Know that buildings will not save you from it. He quickly demolishes them (by the way, you can abuse the free way of raiding neighbors).
From it you will drop a key card to the chests, which are randomly scattered across the cards. They have delicious loot inside.)

You can find a complete list of food on the official wiki:
https://remnants.fandom.com/wiki/Consumables

Insects
The easiest way to satisfy your hunger at the beginning of the game is insects. They are collected together with fibers, as well as when harvesting wood from living trees (green wood). They restore very little, but they are the easiest to find.

Berrys, corn, watermelon, pumpkin mushrooms.
They grow in different areas of the map. It is not easy to find, but it is possible. They restore much more than insects, but you are unlikely to be able to collect a lot of them.

Meat
Loot from killed animals. It is fried at the stake, but you must make sure that it does not burn.
There is also human meat. I do not recommend using it, there are many negative consequences.

Trash cans with food
They contain a variety of chocolate bars, canned food, bottled water and a can of cola. They spawn on various monuments.

Mint
Does not restore satiety and thirst, but gives the effect of "curing diseases" (Which ones ??? I don't know)

Various Blueprints can be found in crates, airdrops, etc.

However, not many people use the research bench.
Only BUILDING BLOCKS can be explored on it.
It is learned by default.
For crafting requires a workbench as well as:
-10 pipes
-3 metal plates
-20 glass fragments
-15 paper
Experience points that you have accumulated during the game are spent to study.

Barrels are a great source of good loot


Breaking barrels only puts out gas in about 2 of 10. You get good resources from barrels. With stone pick it takes 7 hits to break open a barrel, On 7th swing, back up as soon as it hits and you will not take any damage if it is gas. A barrel gives 1 to 6 different items once opened IF not gas.

When you get metal plates, Tin, bricks and so on, save at least 1 of each so use a research or recycle kit on. That way you learn to make the item.

You can pick up any object you have placed by shift+left mouse button. Just make sure you have selected an empty action place holder (the reverse from placing the item)

Locked safe
On the map, you can find a locked safe. You need a key card to open it. You can get it by killing Terminator (a big evil robot), the card drop with a 50% chance.
Inside you will find a nice amount of loot.