How to make a new unit for a new civ?

[BeatriceBernardo]

Note that I'm using Jasper Kitty template, so I would prefer to continue using it, and not make drastic changes like using SQL instead of XML, since the template used XML.

I prefer to use existing arts assets.

I managed to make a new civ, and a new building, since it is in the template. I have made this much:

<?xml version="1.0" encoding="utf-8"?>
<GameData>
    <!-- Almost all gameplay types should first be added to the types table. -->
    <!-- This serves as a central way to reference any type -->
   
    <Types>
    <Row Type="UNIT_BLUE" Kind="KIND_UNIT" />
    </Types>

    <!-- Define the actual unit. -->

    <UnitReplaces>
        <Row CivUniqueUnitType="UNIT_BLUE" ReplacesUnitType="UNIT_SLINGER"/>
    </UnitReplaces>
   
    <Units>
    <Row>
        <UnitType>UNIT_BLUE</UnitType>
        <Name>LOC_UNIT_BLUE_NAME</Name>
        <Description>LOC_UNIT_BLUE_DESCRIPTION</Description>
        <BaseSightRange>2</BaseSightRange>
        <BaseMoves>3</BaseMoves>
        <Combat>15</Combat>
        <RangedCombat>20</RangedCombat>
        <Range>2</Range>
        <Domain>DOMAIN_LAND</Domain>
        <FormationClass>FORMATION_CLASS_LAND_COMBAT</FormationClass>
        <Cost>30</Cost>
        <CanCapture>True</CanCapture>
        <PromotionClass>PROMOTION_CLASS_RANGED</PromotionClass>
        <InitialLevel>1</InitialLevel>
        <CanTrain>True</CanTrain>
        <PurchaseYield>YIELD_GOLD</PurchaseYield>
        <MandatoryObsoleteTech>TECH_MACHINERY</MandatoryObsoleteTech>
        <AdvisorType>ADVISOR_CONQUEST</AdvisorType>
    </Row>
    </Units>
</GameData>

<?xml version="1.0" encoding="utf-8"?>
<GameData>
  <!-- For simplicity sake, we're going to reuse existing icons. -->
  <IconDefinitions>
    <!-- This is the unit icon for the unit. -->
    <Row Name="ICON_UNIT_BLUE" Atlas="ICON_ATLAS_UNITS" Index="21"/>

    <!-- This is the portrait of the unit. -->
    <Row Name="ICON_UNIT_BLUE_PORTRAIT" Atlas="ICON_ATLAS_UNIT_PORTRAITS" Index="21"/>

  </IconDefinitions>
</GameData>

<?xml version="1.0" encoding="utf-8"?>
<GameData>
  <LocalizedText>
    <!-- The name of the unit. -->
    <Row Tag="LOC_UNIT_BLUE_NAME" Language="en_US">
      <Text>BLUE</Text>
    </Row>

    <!-- It's description. -->
    <Row Tag="LOC_UNIT_BLUE_DESCRIPTION" Language="en_US">
      <Text>A simple BLUE.</Text>
    </Row>
  </LocalizedText>
</GameData>

What's next is the Units.artdef and Mod.Art.xml

For Units.artdef, do I just have to copy paste it verbatim into a new file in my Jasper Kitty Solution?

For Mod.Art.xml, my Jasper Kitty Solution already has a Mod.Art.xml how should I combine them?

Generally, what other changes should I make in my Jasper Kitty Solution to make this new unit unique to my civ?