How to un-indent the item in an "enumerate" that's also inside a minipage

Question

I'm constructing a document aiming towards Wildcard's checklist and have come across an indentation that I can't convince LaTeX to omit.

One of the requirements for the checklist is that each (sub)section header, "objective" text, and first item of a list should all be colocated on one page; I'm using the minipage environment to accomplish this (since I don't want to unnecessarily force a \pagebreak if one's not needed). Other page-keeping approaches are welcome if minipage is a bad direction.

I've worked through the issues of restarting the item numbering, and I've tried the options at Remove indent when using enumerate to no avail. I've hacked at it while looking at Javier Bezos' Customizing lists with the enumitem package but I obviously don't understand the pieces involved yet.

Sample input:

\documentclass{article}
\usepackage[nopar]{lipsum}
\usepackage{changepage}
\usepackage{enumitem}
\usepackage[top=0.75in]{geometry}
\title{\vspace{-2.0cm}\textbf{Title for the Whole Checklist}}
\date{}
\author{}

\begin{document}
\maketitle
\subsection*{INTRO SUBHEADER:}
\lipsum[1-5]

% the "SECTION 1", objective, and first step should all be on the same page
\begin{minipage}{\textwidth}
\subsection*{\centering SECTION 1: NAME OF SECTION}
\begin{adjustwidth}{2cm}{2cm}
OBJECTIVE: \lipsum[2]
\end{adjustwidth}
\begin{enumerate}[series=section1,label=\arabic*.]
  \item READ: \lipsum[3]
\end{enumerate}
\end{minipage}
\begin{enumerate}[resume*=section1,label=\arabic*.]
  \item DO: something something
  \item READ: etc
\end{enumerate}
\end{document}

Output:

Desired output would have the first item's label vertically aligned with the remaining items. The item text itself is wrapping and indented appropriately.

Answer 1

Short answer: Add \noindent just before each minipage.

The minipage start a second paragraph, so it will be indented (not the list, but the whole minipage) as any character, or any other box starting the horizontal mode.

Solution: Use \noindent if you want avoid indentation only in the paragraph with the minipage, or set \parindent to 0pt (i.e., \setlength\parindent{0pt}) somewhere before (the preamble is the best place to avoid indentation in all the document). To change indentation in some longer than one paragraph, change the setting again after each part, or use {\setlength\parindent{0pt} ... } to limit the scope of the command to the ... part only.