How do you even start creating mods for this game??

[IndianaJones]

I did some simple mods for different games, I know XML and basic bitmap editing, I'm not familiar with Java.
But to be honest I'm not sure where to even start. Could someone create a short video showing basics?

I'm interested in adding more content to the game, like new weapon variant or new building.

Below mods look very interesting to me.
https://www.nexusmods.com/spacehaven/mods/89

https://www.nexusmods.com/spacehaven/mods/104

I guess you have folder template, textures folder and a bunch on XML files describing texture position and some logic, like item's stats.

How do you generate those XMLs? A short video on youtube would be very much helpful.
How do I ensure texture size is correct?
Can you recommend some tools for it?

<AllAnimations>
	<animations>
		
		<ba f="30" id="10176" ks="1" n="Spreggo_meditankInUse">
			<bones>
				<b id="0">
					<pos>
						<p col="-1" f="1" r="0" sx="1" sy="1" x="0" y="0" />
					</pos>
				</b>
			</bones>
			<items>
				<assetPos filename="623719992" bi="0" r="0" sx="1" sy="1" vf="1:1" x="0" y="29" />
			</items>
		</ba>
		
		<ba f="30" id="10178" ks="1" n="Spreggo_meditankIndicator">
			<bones>
				<b id="0">
					<pos>
						<p col="-1" f="1" r="0" sx="1" sy="1" x="0" y="0" />
					</pos>
				</b>
			</bones>
			<items>
				<assetPos filename="623719993" bi="0" r="0" sx="1" sy="1" vf="1:1" x="0" y="29" />
			</items>
		</ba>	

<AllTexturesAndRegions>
  <textures>
    <t i="623710003" w="2457" h="2457"/>
  </textures>
  <regions>
    <re n="9543" t="623710003" x="0" y="0" w="100" h="100" file="623719992.png"/>
    <re n="9544" t="623710003" x="100" y="0" w="100" h="100" file="623719993.png"/>
    <re n="9545" t="623710003" x="200" y="0" w="100" h="100" file="62371999.png"/>
  </regions>
</AllTexturesAndRegions>

[aksel_bugbyte]

Hi there.

The best help is found on our Discord server in the modding channel. There is more activity there: https://discord.gg/spacehaven