How to make CUSTOM SIGNS in Minecraft! (Tutorial, 1.15+ (Java))

Made this in Java 1.15.2
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TIME STAMPS:
0:00 -- Intro
0:30 -- Text
2:51 -- Text on Multiple Lines
4:58 -- Multiple Lines (note)
5:32 -- Colored Text
6:16 -- Stylized Text
7:10 -- Multi-Colored Text
8:57 -- Multi-Styled Text
10:32 -- Using Selectors
12:24 -- Selector Example and Notes
15:38 -- Conclusion
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COMMANDS:
/data merge block x y z {Text1:'{"text":"(text)"}'} --text, one line
/data merge block x y z {Text1:'{"text":"(text)"}',Text2:'{"text":"(text)"}',Text3:'{"text":"(text)"}',Text4:'{"text":"(text)"}'} --text, multiple lines
/data merge block x y z {Text1:'{"text":"(text)","color":"(color)"}'} --colored text
/data merge block x y z {Text1:'{"text":"(text)","(style)":true}'} --styled text
/data merge block x y z {Text1:'[{"text":"(text)","color":"(color1)"},{"text":"(text)","color":"(color2)"}]'} -- multi-colored text
/data merge block x y z {Text1:'[{"text":"(text)","(style1)":true},{"text":"(text)","(style1)":false,"(style2)":true}]'} -- multi-styled text
/data merge block x y z {Text1:'{"selector":"(selector)"}'} -- using a selector
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COLOR OPTIONS:
"white"
"red"
"dark_red"
"gold" (orange)
"yellow"
"green"
"dark_green"
"aqua" (very light blue)
"dark_aqua" (turquoise)
"blue"
"dark_blue"
"dark_purple" (purple/violet)
"light_purple" (pink)
"black" (default)
"gray"
"dark_gray"
"reset" -- resets the color
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STYLE OPTIONS:
"bold"
"italic"
"underlined"
"obfuscated"
"strikethrough"
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SELECTOR OPTIONS:
@a -- All players
@e -- All entities
@p -- Nearest player
@r -- Random Player
*@s may not work in this
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EXAMPLES:
/data merge block ~ ~1 ~ {Text1:'{"text":"Text"}'}
/data merge block ~ ~1 ~ {Text1:'{"text":"Text"}',Text2:'{"text":"On"}',Text3:'{"text":"Multiple"}',Text4:'{"text":"Lines"}'}
/data merge block ~ ~1 ~ {Text1:'{"text":"1"}',Text3:'{"text":"3"}'}
/data merge block ~ ~1 ~ {Text1:'{"text":"Colored text","color":"green"}'}
/data merge block ~ ~1 ~ {Text1:'{"text":"Stylized text","color":"aqua","bold":true}'}
/data merge block ~ ~1 ~ {Text1:'[{"text":"Mult","color":"green"},{"text":"iple","color":"aqua"}]',Text2:'[{"text":"Stu","color":"gold"},{"text":"ffs","color":"red"}]'}
/data merge block ~ ~1 ~ {Text1:'[{"text":"Mult","color":"green","underlined":true,"strikethrough":true},{"text":"iple","color":"aqua","strikethrough":false}]',Text2:'[{"text":"Sty","color":"gold","italic":true},{"text":"les","color":"red","bold":true}]'}
/data merge block ~ ~1 ~ {Text1:'{"text":"Selectors?","color":"light_purple","bold":true}',Text2:'{"selector":"@p","color":"blue","underlined":true}'}
/data merge block ~ ~1 ~ {Text1:'[{"selector":"@e[tag=woof]"},{"text":"\'s"}]',Text2:'{"text":"CASTLE","color":"red","bold":true}'}
/data merge block 7 4 -10 {Text1:'{"text":"Very","color":"dark_aqua","bold":true}',Text2:'{"text":"Cool","color":"aqua","italic":true}',Text3:'{"text":"SIGN","color":"green","bold":true}',Text4:'{"text":"eeeeeeeee","obfuscated":true,"bold":true}'}
/data merge block -7 9 -13 {Text1:'{"text":"WOAWWWWWWWWWW","color":"white","obfuscated":true}',Text2:'{"text":"WOAWWWWWWWWWW","color":"white","obfuscated":true}',Text3:'{"text":"WOAWWWWWWWWWW","color":"white","obfuscated":true}',Text4:'{"text":"WOAWWWWWWWWWW","color":"white","obfuscated":true}'}
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John:
/summon wolf ~ ~1 ~ {CustomName:"[{\"text\":\"!!\",\"color\":\"green\",\"obfuscated\":true},{\"text\":\"Jo\",\"color\":\"aqua\",\"bold\":true,\"underlined\":true,\"obfuscated\":false},{\"text\":\"hn\",\"color\":\"dark_aqua\",\"bold\":true,\"italic\":true,\"obfuscated\":false},{\"text\":\"!!\"}]",CustomNameVisible:1,Tags:["woof"]}