I did self study myself. The best I can suggest is to get a book that explains it in a way you understand. Then once you start studying you need to give yourself breaks between learning new things. For example you might read chapter one and reflect on what you learned and then come back an hour later and read chapter 2.
I removed your link since what you said in the video is just like;
searching for things on the internet like the most important greetings and grammar
using a website to make pen pals
reading a Japanese book
I don't think this is helpful for learners, though. How about to introduce the sites you used instead of promoting your channel?