I'm not familiar with Python and Perl, but for MySQL, I would suggest news://comp.databases.mysql - there are always good folks in that group who might be willing to help you.
For Python, I would suggest you start with news://comp.lang.python and for Perl, there are lots of groups so start with news://comp.lang.perl.misc.
You might also want to get yourself a news reader, and subscribe to a good Usenet service. I'm using eternal-september.org, free and fast servers (no binaries).