Hi Rosko, I happen to know some good resources you should look into.
Some standalone programs for making chiptune are:
FamiTracker: http://famitracker.com/
MilkyTracker: https://milkytracker.org/
Pxtone: https://www.cavestory.org/pixels-works/pxtone-collage.php
Some VSTs if you want to use a DAW:
https://transverseaudio.com/posts/best-free-chiptune-vst-synths
https://www.tweakbench.com/
https://woolyss.com/chipmusic-plugins.php
Hope this helps!