Section Design for Poetry Book

Question

After finishing my thesis I am starting to write a book with all my poems. Due to my thesis I am used to scrbook class and can handle koma script a bit. But I fail at adjusting the section headings. Consider the following MWE (using LuaLaTeX and depicting a typical verse scheme of mine) using a design I asked for before.:

\documentclass{scrbook}     
\usepackage[no-math]{fontspec}
\usepackage{Alegreya}
\usepackage{xcolor}
\usepackage{pgf}
\usepackage{tikz}
\usepackage{blindtext}
\definecolor{themecolor}{RGB}{180, 220, 70}
% Design Chapter
\renewcommand\raggedchapter{\raggedleft}
\setkomafont{chapter}{\Huge}
\setkomafont{chapterprefix}{\large\scshape\rmfamily}
\tikzset{
    headings/base/.style = {
        outer sep = 5pt,
        inner sep = 0pt,
        inner xsep = 10pt,
    },
    headings/chapterbackground/.style = {
        headings/base,
        font = \strut,% equal height no matter if capitals or 'g', 'p', etc are used or not
    },
    headings/chapapp/.style = {
        headings/base,
        text = themecolor,
        font = \usekomafont{chapterprefix}
    },
    headings/chapterline/.style = {
        themecolor,
        line width = 2pt,
    }
}
\makeatletter% 
\renewcommand*\chapterlinesformat[3]{%
    \ifstr{#1}{chapter}{%
        \begin{tikzpicture}[baseline=(title.base)]
        \nodeheadings/chapterbackground{%
            \parbox[t]
            {\dimexpr\textwidth-2\pgfkeysvalueof{/pgf/outer xsep}\relax}%
            {\raggedchapter #3}%
        };
        \node[headings/chapapp,anchor=south east]
        at ([xshift=0pt, yshift=-12pt]title.north east){\ifstr{#2}{}{}{\chapapp}\strut};% Positionierung chapterprefix
        \useasboundingbox
        (current bounding box.north west)
        rectangle
        ([xshift=0pt, yshift=-10pt]current bounding box.south east);%
        \draw[headings/chapterline]
        (current bounding box.south east)++(0.5\pgflinewidth,0)--+(0,\paperheight);
        \end{tikzpicture}
        \par
    }{%
        @hangfrom{#2}{#3}% other section levels using style=chapter
    }%
}
\makeatother
\begin{document}
    \chapter{Poems of Love}
    \addsec{Title of the poem}
    This is the first line\
    and this the second line of a verse.
    \bigskip
This is where the common text starts.\\
\blindtext

This is a new block without parskip.
\blindtext
\bigskip

\blindtext
\bigskip

This is the first line\\
and the second of the last verse.

\end{document}

What I would like to achieve is: Chaptertitle instead of chapterprefix Sectiontitle instead of chaptertitle Considering the MWE, something like this:

Poems of Love (instead of "Chapter", green color)

Title of the poem (instead of "Poems of love", black color)

This is the first line ...

However, I tried to replace "chapter" and "chapterlinesformat" by "section" and "sectionlinesformat", but that does not work and gives error messages. I plan to have the actual chaptertitle on a single page and let the chaptertitle appear again above every section. I hope this link with an example works.

PS: I am not tied to scrbook. I've just chosen it because I know it the most due to my theses. I tried memoir class before but was unsatisfied with the layout. So I am open to any suggestions to ease my ideas and appreciate your help.