I am only aware of the three tutorials posted on the Bootstrap Studio site. I have never used any of the templates, so I'm not familiar with what you are specifically talking about. The program is frequently updated so it's possible some things in the tutorials may be slightly different, but they shouldn't be drastically changed.
Understanding how links (text, buttons or images) enable navigation to different places on pages (anchors) and to other pages in a website is pretty fundamental HTML stuff. Do you have any experience working with HTML and CSS or the Document Object Model (DOM)? These are fundamental skills necessary for creating websites, whether you're using a builder like Bootstrap Studio or coding a site by hand.
Bootstrap Studio is, unfortunately, not best documented program, and it does kind of assume that the user already has some knowledge of how websites are built and how they function through the use of HTML and CSS in order to really get the most out of it. Familiarity with the Bootstrap Framework is also very helpful. If you have no knowledge of markup and coding, and specifically writing CSS, you are going to find it difficult to use this program. Bootstrap studio automates a lot of task with its visual user interface and pre-made components, but it is not a pure drag-n-drop builder like Wix or Weebly, which cater to beginners and non-coders. Those programs are easier to use, but are restricted in their capabilities so users can't "break" their websites. Bootstrap studio does not have such restrictions.
Also, you should familiarize yourself with all the written tutorials on the Bootstrap Studio site https://bootstrapstudio.io/tutorials/
As well as the Bootstrap Framework itself https://getbootstrap.com/docs/4.3/getting-started/introduction/
As you get more advanced, you should consider joining https://stackoverflow.com/ where you can ask and find answers to just about any coding or website questions imaginable. That is my go-to site when I am stuck (which doesn't happen a lot these days, but was a frequent problem when I first started ten years ago.)
Building websites can seem overwhelming at times, but if you persevere and dedicate yourself, it will get easier. Good luck!