I need help with making 2 custom shaders work with URP 7.3.1

I have 2 Custom shaders that aren't made for URP and I just want to know how to make them compatible with URP.

Code (Shader):

1. Shader "Custom/TerrainShader"
2. {
3.     Properties{
4.         _Color("Color", Color) = (1,1,1,1)
5.         _MainTex("Albedo (RGB)", 2D) = "white" {}
6.         _Glossiness("Smoothness", Range(0,1)) = 0.5
7.         _Metallic("Metallic", Range(0,1)) = 0.0
8.     }
9.     SubShader{
10.         Tags{ "RenderType" = "Opaque"}
11.         LOD 200
12.         Blend SrcAlpha OneMinusSrcAlpha
13.  
14.         CGPROGRAM
15.         #pragma surface surf Standard fullforwardshadows addshadow
16.         #pragma target 3.0
17.  
18.         sampler2D _MainTex;
19.  
20.         struct Input {
21.             float2 uv_MainTex;
22.             float4 color : Color;
23.         };
24.  
25.         half   _Glossiness;
26.         half   _Metallic;
27.         fixed4 _Color;
28.         half   _Alpha;
29.  
30.         void surf(Input IN, inout SurfaceOutputStandard o)
31.         {                      
32.             fixed4 c = IN.color;
33.  
34.             o.Albedo     = c;
35.             o.Metallic   = _Metallic;
36.             o.Smoothness = _Glossiness;
37.         }
38.         ENDCG
39.         }
40.         FallBack "Diffuse"
41. }

Heres my second one

Code (Shader):

1. Shader "Custom/WaterShader"
2. {
3.     Properties{
4.         _Color("Color", Color) = (1,1,1,1)
5.         _MainTex("Albedo (RGB)", 2D) = "white" {}
6.         _Glossiness("Smoothness", Range(0,1)) = 0.5
7.         _Metallic("Metallic", Range(0,1)) = 0.0
8.     }
9.     SubShader{
10.         Tags {"Queue" = "Transparent" "RenderType"="Transparent" }
11.         LOD 200
12.         Blend SrcAlpha OneMinusSrcAlpha
13.  
14.         CGPROGRAM
15.         #pragma surface surf Standard  fullforwardshadows alpha:fade
16.         #pragma target 3.0
17.  
18.         sampler2D _MainTex;
19.  
20.         struct Input {
21.             float2 uv_MainTex;
22.             float4 color : Color;
23.         };
24.  
25.         half   _Glossiness;
26.         half   _Metallic;
27.         fixed4 _Color;
28.         half   _Alpha;
29.  
30.         void surf(Input IN, inout SurfaceOutputStandard o)
31.         {                      
32.             fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
33.             o.Albedo = c.rgb;
34.             o.Metallic = _Metallic;
35.             o.Smoothness = _Glossiness;
36.             o.Alpha = c.a;
37.         }
38.         ENDCG
39.         }
40.         FallBack "Standard"
41. }

 

(For terrain shader) Just add vertex color in shader graph link it with base color. Thats it...
(114) MESH COLOR in Unity - Terrain Generation - YouTube