
As the title says, is there a way to do this by using the fancybox features? I'd really like to know if it's possible.
Also, what's the font written in the text? Is there a way to replicate it?
I's suggest you tcolorbox:

The code (adjust the settings according to your needs):
\documentclass{article}
\usepackage[many]{tcolorbox}
\usepackage{lipsum}
\definecolor{titlebg}{RGB}{100,22,72}
\newtcolorbox{learn}{
breakable,
enhanced,
arc=0pt,
outer arc=0pt,
colframe=titlebg,
colback=titlebg!05,
overlay unbroken and first={
\node[
draw=titlebg,
fill=titlebg,
rotate=270,
anchor=north west,
text=white,
font=\bfseries
]
at (frame.north west)
{LEARN THIS};
}
}
\begin{document}
\lipsum[4]
\begin{learn}
\lipsum[1-3]
\end{learn}
\end{document}
Regarding the fonts part of the question, please see How do I find out what fonts are used in a document/picture?.