Trying to parse only 3 key values from json file

[cubangt]

So im playing around with parsing a json file in python.
Im able to read in the file and print it to the console, but now i want to extract 3 values from each "section" not sure what the proper terminology is.

Here is a example of the data structure..:
  "messages": [
    {
      "sender_name": "Me",
      "timestamp_ms": 1653260883178,
      "content": "There are plenty of leftovers",
      "type": "Generic",
      "is_unsent": false,
      "is_taken_down": false,
      "bumped_message_metadata": {
        "bumped_message": "There are plenty of leftovers",
        "is_bumped": false
      }
    },
    {
      "sender_name": "Me",
      "timestamp_ms": 1653260872966,
      "content": "Watching the new scream movie",
      "type": "Generic",
      "is_unsent": false,
      "is_taken_down": false,
      "bumped_message_metadata": {
        "bumped_message": "Watching the new scream movie",
        "is_bumped": false
      }
    },

I basically need to pull out only the first 3 sets of values and save it into a CSV file.

      "sender_name": "Me",
      "timestamp_ms": 1653260883178,
      "content": "There are plenty of leftovers",

Right now i have this basic simple code, but need to figure out how to get within the "message" section and pull out those 3 values per group

import json

f = open('message_1.json')

data = json.load(f)

for i in data['messages']:
     print(i)

f.close()