You go back to your EC2 instance, and copy the public ip address from your instance into your browser. I do believe I forgot to mention that in the tutorial at the end, Sorry about that! And thanks for bringing it to my attention! I will update that right now.
As for the ports, 5000, and 3000, yes they are running off those ports for front and back end. Utilizing PM2, will basically allow it to run concurrently.
If you have any more curiosities, take a look at my video walk through I just made: https://www.youtube.com/watch?v=fIeIzHMC4BQ
It might shine some better understanding.
Thanks Logeswaran! It’s my pleasure to be of assistance! This goes for anyone as well, but please don’t hesitate to ask any questions or to give any constructive criticism/additions!