Update README in docs

docs/README.md

@@ -1,29 +1,81 @@
-# User Guide
+# User Guide: Axel
 
-## Features 
+Axel is a chatbot designed to help the user in managing tasks, for use in the CLI.
 
-### Feature-ABC
+## Quick Start
 
-Description of the feature.
+1. Ensure you have Java 11 or above installed on your computer.
+2. Download the latest Axel.jar from here
+3. Copy the file to the folder you want to use as the home folder for the program.
+4. Open a command terminal, `cd` into the chosen folder, and run the app by entering `java -jar Axel.jar`.
+5. Type a command into the CLI and press enter to execute it.
+6. Once done, type `bye` to end the application.
 
-### Feature-XYZ
+## Features
 
-Description of the feature.
+### *Notes about the command format*
+- Words in square brackets, eg `[BY]`, `[FROM]` refer to user input parameters
+- Words in curly brackets, eg `{TO}` refer to optional parameters
+- Parameters have to be entered in the order as specified by this guide.
+- Extra parameters for commands will be ignored.
 
-## Usage
 
-### `Keyword` - Describe action
+### *Adding a task:* `todo`, `deadline` and `event`
+Adds a `Task` to the list.
 
-Describe the action and its outcome.
+Format: `todo/deadline/event [NAME] {Additional parameters}`
 
-Example of usage: 
+There are 3 sub-types of task, `ToDo`, `Deadline` and `Event`.
+- `ToDo` is added by entering `todo [NAME]`
+- `Deadline` is added by entering `deadline [NAME] /by [TIME]`
+- `Event` is added by entering `event [NAME] /from [START] /to [END]`
 
-`keyword (optional arguments)`
+Each type of task has different parameters for time to make it easier to keep track of important dates and times.
+Times entered by the user will be stored as-is, and should not include any forward slash characters.
 
-Expected outcome:
+Examples:
+- `todo homework`
+- `deadline submit group project /by 2230 hours`
+- `event cs2113 lecture /from 1600 /to 1800`
 
-Description of the outcome.
 
-```
-expected output
-```
+### *Deleting a task:* `delete`
+Deletes a `Task`.
+
+Format: `delete [INDEX]`
+- Deletes the `Task` at the specified index. Indices start from 1.
+- Indices must be a positive integer.
+
+Example:
+- `delete 1` Deletes the task at index 1
+
+
+### *Listing all tasks:* `list`
+Lists all existing tasks.
+
+
+### *Locating tasks by keyword* `find`
+Finds a task by searching for a single keyword in its name.
+
+Format: `find [KEYWORD]`
+
+
+### *Marking tasks as done* `mark`,`unmark`
+Adds or removes a mark on a task which indicates it as done.
+
+Format: `mark [INDEX]`, `unmark[INDEX]`
+- Marks/unmarks the `Task` at the specified index. Indices start from 1.
+- Indices must be a positive integer.
+  Example:
+- `mark 1` Marks the task at index 1
+- `unmark 10` Unmarks the task at index 10
+
+
+### *Saving the list of tasks*
+Axel will save the current list of tasks in `data/duke.txt` after each command is completed.
+If the file does not exist, Axel will automatically create one.
+
+
+### *Loading list of tasks from save data*
+Whenever Axel is started, it will automatically find `data/duke.txt` and import the data in it.
+If the file does not exist, Axel will create a new, empty list of tasks.