need installation instructions for pipx

Installing on LinuxMint.
did "sudo apt-get install python3-pip python3-pyqt5 python3-setuptools libcups2-dev python3-pyqt5.qtsvg'
all good here but when I do "sudo pip3 install --upgrade inkcut" I get:

Quoted message:

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
python3-xyz, where xyz is the package you are trying to
install.
If you wish to install a non-Debian-packaged Python package,
create a virtual environment using python3 -m venv path/to/venv.
Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
sure you have python3-full installed.

If you wish to install a non-Debian packaged Python application,
it may be easiest to use pipx install xyz, which will manage a
virtual environment for you. Make sure you have pipx installed.

See /usr/share/doc/python3.12/README.venv for more information.
note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.

not idea what to do but doing "sudo pipx install --upgrade inkcut" it did install and can see it when I use 'pipx list'

but when I type command 'inkcut' I get:

Quoted message:

2025-09-14 21:54:12,651 | INFO | inkcut | ========================================
2025-09-14 21:54:12,651 | INFO | inkcut | Inkcut launched
2025-09-14 21:54:12,651 | INFO | inkcut | Version: 2.1.6
2025-09-14 21:54:12,651 | INFO | inkcut | Python: 3.12.3 (main, Aug 14 2025, 17:47:21) [GCC 13.3.0]
2025-09-14 21:54:12,651 | INFO | inkcut | System: uname_result(system='Linux', node='firefly-IBP', release='6.14.0-29-generic', version='#29~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Aug 14 16:52:50 UTC 2', machine='x86_64')
2025-09-14 21:54:12,651 | INFO | inkcut | Executable: /home/firefly/.local/share/pipx/venvs/inkcut/bin/python
2025-09-14 21:54:12,651 | INFO | inkcut | Args: ['/home/firefly/.local/bin/inkcut']
2025-09-14 21:54:12,656 | ERROR | inkcut | No Qt bindings could be found
Traceback (most recent call last):
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/inkcut/app.py", line 78, in log_debug_info
from qtpy import QT_VERSION
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/qtpy/init.py", line 293, in <module>
raise QtBindingsNotFoundError from None
qtpy.QtBindingsNotFoundError: No Qt bindings could be found
2025-09-14 21:54:12,657 | INFO | inkcut | ========================================
2025-09-14 21:54:12,660 | ERROR | inkcut | Traceback (most recent call last):
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/inkcut/app.py", line 97, in main
from inkcut.core.workbench import InkcutWorkbench
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/inkcut/core/workbench.py", line 17, in <module>
enamlx.install()
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/enamlx/init.py", line 6, in install
from enamlx.qt import qt_factories # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/enamlx/qt/qt_factories.py", line 8, in <module>
from enaml.qt import qt_factories
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/enaml/qt/init.py", line 8, in <module>
from qtpy import (
File "/home/firefly/.local/share/pipx/venvs/inkcut/lib/python3.12/site-packages/qtpy/init.py", line 293, in <module>
raise QtBindingsNotFoundError from None
qtpy.QtBindingsNotFoundError: No Qt bindings could be found

so what to do now?