Am I Learning by doing projects the correct way?

Newbie here. I just finished building a weather app (my first project actually). And I would like to get some feedbacks to see what I can improve on.

I basically spent a day following along a 50 min youtube video of how to build it. I am coding pretty much line by line. I would say that 75% of the lines make sense to me. A lot of codes make sense, but it is only after he explained it to me.

Now that I am done with my 1st project. I am trying to move onto the next ones. How can I improve my learning process with by doing more projects.