No it's against the T&Cs for this community to use it to promote commercial services such as co-hosting @Guada179
As you say you are good at PR use these skills to put together a marketing plan to promote your services to your target audience and invest in online advertising to drive traffic to whatever channels you have set up to promote your business.
Sometimes you will see hosts on here ask for co-hosts and you can respond to them directly.
The best way to be part of this community is to use the expertise you have built up as a host to contribute advice and support to other hosts.