Add welcome-intro to lesson 2, Build a Basic NFT

Author: elPiablo

pages/lessons/projects/2.mdx

@@ -23,6 +23,12 @@ import { LessonHeader } from '../../../components/mdx/LessonHeader'
 
 <LessonHeader title="Lesson 2: Build a Basic NFT" />
 
+## About this lesson
+
+Welcome to this lesson on creating a series of NFTs using Solidity smart contracts with a range of developer tools. If you are new to programming, we recommend you first complete our *Getting Started with Smart Contract Development* project, where you can learn the basics of Solidity and the some of the concepts we use in this lesson. We alst have a series of follow-up projects to this one, the next one being *TierNFTs*, but let's not get ahead of ourselves just yet.
+
+We have some checkpoint questions for you throughout the lesson for testing either your previous knowledge, predicting next steps in the lesson, or letting you see for yourself how well you're absorbing the new content. Needless to say, there's a quiz at the end, so make sure you're checking out all the side-drawers for a deeper dive of the new concepts. To complete the lesson, expect somewhere between two and six hours depending on your previous experience and the need to learn new ideas. Let's make developing enjoyable, so take care of your well-being - we have a pomodoro timer ⌛ for you in the menu header to let you ensure you’re taking regular breaks, and please *do* go outside and 'touch some grass'😊.
+
 ## What are we buidling?
 
 In this project we will build a basic NFT smart contract, that will serve us as
@@ -52,7 +58,7 @@ discover.
 **But, what is it with all the hype around them?** As well as being unique, they have the
 ability to carry properties inside them. The value inherent to blockchains and
 the fact ownership can be transferred, leads to people attaching value to them.
-This has created huge opportunities for marketplaces to buy and sell these assets.
+This has created huge opportunities for individuals, marketplaces and platforms to trade, transfer or issue these assets.
 
 Now that we know they can be much more than just an image, what are we waiting for!
 
@@ -70,7 +76,7 @@ By the end of this lesson we are going to learn a lot of things. A simple breakd
 
 ## Set up your environment
 
-like the pros. For that we are going to set up our working environment in our
+Like the pros. For that we are going to set up our working environment in our
 computer, making sure we have all the necessary tools to create, debug and
 deploy smart contracts.