RHEL PyEnv Python Install without Root / Sudo access

Question

I am looking to install Python 3.10.9 and some packages behind a firewall on RHEL 7 machine.

I do not have administrative rights, nor access to elevated privileges. Some core requirements are missing to build items from source. I've been unable to build with OpenSSL, and thus can't pip install packages.

I prefer to stick to packaged solutions as much as possible, so I've pursued a path that allows installing dependencies with yum.

Relevant related questions Preparing _tkinter and sqlite3 for Python installation (no admin rights)

Relevant lessons: How to install packages in Linux (CentOS) without root user with automatic dependency handling?

# Install prerequisites
mkdir ~/rpm
mkdir ~/rhel
yumdownloader --destdir ~/rpm --resolve zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel tk-devel libffi-devel xz-devel libffi
cd ~/rhel && for i in ~/rpm/*.rpm; do rpm2cpio $i | cpio -idv; done  

# Modify ~/.bashrc with necessary flags and includes. See .bashrc below
source ~/.bashrc

#Download pyenv and install
curl https://pyenv.run | bash
pyenv install 3.10.9

The part I seem to be getting stuck on, is correctly referencing the various libraries that are installed.

Rather than build dependencies from source, utilized yum to install:

Current ~/.bashrc

# For building custom YUM locally
export PATH="$HOME/rhel/usr/sbin:$HOME/rhel/usr/bin:$HOME/rhel/bin:$PATH"
export MANPATH="$HOME/rhel/usr/share/man:$MANPATH"
L='/lib:/lib64:/usr/lib:/usr/lib64'
export LD_LIBRARY_PATH="$HOME/rhel/usr/lib:$HOME/rhel/usr/lib64:$L"


# PyEnv install https://www.mpietruszka.com/install-pyenv-ce-rhel8.html
export PYENV_ROOT="$HOME/.pyenv"
command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"


#export PKG_CONFIG_PATH=$HOME/rhel/usr/lib/pkgconfig:$PKG_CONFIG_PATH

#LDFLAGS
export LDFLAGS="-L$HOME/rhel/usr/lib -L$HOME/rhel/usr/lib64 -L/usr/lib -L/usr/lib64 -L/lib -L/lib64"

#CPPFLAGS
export CPPFLAGS="-I$HOME/rhel/usr/lib -I$HOME/rhel/usr/lib64 -I/usr/lib -I/usr/lib64 -I/lib -I/lib64"

#LD_Library
LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$HOME/rhel/usr/include"

The errors I'm currently getting

pyenv install 3.10.9
Downloading Python-3.10.9.tar.xz...
-> https://www.python.org/ftp/python/3.10.9/Python-3.10.9.tar.xz
Installing Python-3.10.9...
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "~/.pyenv/versions/3.10.9/lib/python3.10/ctypes/__init__.py", line 8, in <module>
    from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'
WARNING: The Python ctypes extension was not compiled. Missing the libffi lib?
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'readline'
WARNING: The Python readline extension was not compiled. Missing the GNU readline lib?
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "~/.pyenv/versions/3.10.9/lib/python3.10/ssl.py", line 99, in <module>
    import _ssl             # if we can't import it, let the error propagate
ModuleNotFoundError: No module named '_ssl'
ERROR: The Python ssl extension was not compiled. Missing the OpenSSL lib?

Please consult to the Wiki page to fix the problem.
https://github.com/pyenv/pyenv/wiki/Common-build-problems


BUILD FAILED (RedHatEnterpriseServer 7.7 using python-build 20180424)

Inspect or clean up the working tree at /tmp/python-build.20230208180402.153250
Results logged to /tmp/python-build.20230208180402.153250.log

Last 10 log lines:
                $ensurepip --root=/ ; \
fi
Looking in links: /tmp/tmp540mosi3
Processing /tmp/tmp540mosi3/setuptools-65.5.0-py3-none-any.whl
Processing /tmp/tmp540mosi3/pip-22.3.1-py3-none-any.whl
Installing collected packages: setuptools, pip
  WARNING: The scripts pip3 and pip3.10 are installed in '~/.pyenv/versions/3.10.9/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-22.3.1 setuptools-65.5.0
make: warning:  Clock skew detected.  Your build may be incomplete.

I'd appreciate some criticism on correctly calling these libraries...