The website uses drupal.
I hate to rain on your enthusiasm but maybe you should first look at trying
to [https://trisquel.info/en/wiki/how-help help the project] in smaller ways
first. It is always nice when people want to help. However the website and
especially the mailing lists and forums are a huge deal. I don't think it is
totally appropriate for someone who is relatively new and has not contributed
a lot to work on such a large project for the community. This is because
what if you were not able to complete the project where would we be? What if
you left the community as is normal. People come and go. Who would take
over?
There is also the "don't fix it if it isn't broken principle." What is so
bad about the current forum that needs to be improved by totally redoing it
with a whole new set of software?
My advice is get your feet wet with the community by helping out in smaller
ways first. It is just unrealistic to let someone who hasn't worked with us
before to handle such a key project by themselves and that would bring such
radical change to a key part of the website (especially when IMO it is
working fine). Sorry but upgrading the forum I think is low priority for us
right now. I don't speak for the project keep that in mind. That is just my
opinion.