Use Beamer with notes

Add notes to your slide

For each frame, you can add notes by \note{} command.

\begin{frame}{Frame with notes}
  \begin{itemize}
    \item<1-> Text.
    \item<2-> Text.
    \item<3-> Text.
  \end{itemize}

  \note{
    \begin{itemize}
      \item These are some
      \item items in a list
      \item full of notes
    \end{itemize}
  }
\end{frame}

Print your slides with notes

By default, the notes will not be displayed. You can configure the beamer before the document environment like this:

\setbeameroption{show notes}

...

\begin{document}
...
\end{document}

This configuration will make each frame (if it has notes) printed with its notes.

Only print your notes

Configure your beamer like this:

\setbeameroption{show notes only}

...

\begin{document}
...
\end{document}

In this case, the frame contents will not be printed. You can put the notes on your second screen. when delivering your presentation.

A true second-screen presentation

If you want to have an experience like using a PPT. You may need to install a lot of stuff:

https://github.com/Cimbali/pympress#on-windows

https://www.scivision.dev/beamer-latex-dual-display-pdf-notes/