No they/we are not, at least in the real world. Leftcom is an extremely online thing like tankies or anarcho-whatevers. I’m just a communist who has to call myself leftcom on the internet to seperate my views and aims from other communists.
What do you mean “cant start”? A union is just a group of people lol. Like literally talk to people, agree to act in certain ways in unison and you have a union.