Update README.md

Author: josemoracard

.learn/exercises/03-first-flask-app/README.md

@@ -1,8 +1,8 @@
-## `03` First Flask App
+# `03` First Flask App
 
 Flask is an app that behaves like a web server: it exposes (publishes) a group of URLs to the internet (like an API or website). 
 
-For example, you can use Flask with a domain and expose the following URLs to the internet: 
+For example, you can use Flask with a domain and expose the following URLs to the Internet: 
 
 ```txt
 mywebsite.com/home
@@ -12,16 +12,17 @@ mywebsite.com/contact-me
 
 Those three URLs exposed by Flask will become your personal website.
 
-To create our first server, we need to add the following two lines to our python file that we are going to create (These two lines have to be in every flask project you create to work correctly):
+To create our first server, we need to add the following two lines to our Python file that we are going to create (These two lines have to be in every flask project you create to work correctly):
 
 ```python
 from flask import Flask
 app = Flask(__name__)
 ```
+
 ## 📝 Instructions:
 
-1. On the root of your project create a `src` folder.  
+1. On the root of your project, create a `src` folder.  
 
 2. Inside of it, create a file named `app.py`. 
 
-3. As instructed above, add the code to create a new flask app.
+3. As instructed above, add the code to create a new Flask app.