open a terminal by default

tasks.json

{
  "version": "2.0.0",
  "presentation": {
    "echo": false,
    "reveal": "always",
    "focus": true,
    "panel": "dedicated",
    "showReuseMessage": true
  },
  "tasks": [
    {
      "label": "Create terminal",
      "dependsOn": ["First"],
      // Mark as the default build task so cmd/ctrl+shift+b will create them
      "group": {
        "kind": "build",
        "isDefault": true
      },
      // Try start the task on folder open
      "runOptions": {
        "runOn": "folderOpen"
      }
    },
    {
      // The name that shows up in terminal tab
      "label": "Terminal",
      // The task will launch a shell
      "type": "shell",
      "command": "zsh",
      // Set the shell type
      "options": {
        "shell": {
          "executable": "",
          "args": []
        }
      },
      // Mark as a background task to avoid the spinner animation on the terminal tab
      "isBackground": true,
      "problemMatcher": [],
      // Create the tasks in a terminal group
      "presentation": {
        "group": "my-group"
      }
    }
  ]
}

Based a little bit off of this and sa lot more reading https://code.visualstudio.com/docs/terminal/profiles edit zsh to your preference