Help with cloning Litecoin into its own currency?

Hi there, I’m looking to clone Litecoin to experiment with my creating my own cryptocurrency. I have followed this guide on cloning scrypt based altcoins, among other guides on youtube to try to create my own currency.

Unfortunately, all guides use outdated source, and I would like to work with the latest stable core build. Trying to find relevant bits and pieces from old guides in the updated source is inefficient and most likely futile.

I know foundational C++, but not enough to wade through this on my own. Is there anyone who could help or provide up-to-date resources on achieving this task? Thank you so much.