By its nature it’ll vary in each community, political parties are always a safe bet, most areas will have socialists or communists and whether or not you identify as one of those they’ll likely have resources for labor organizations in the area. I’m not suggesting that everyone has to be a leftist, but just that leftists have been doing this work for decades and tend to organize.

The IWW union is an international union that provides support to people looking to organize their workplaces.

On the topic of unions, I’m sure most unions in your city would be willing to help answer your questions and give you guidance. They might have websites where you can reach out to ask for advice.

Your city’s pride parade or other socially conscious events like demonstrations will also see participation from these kinds of groups. It can be a good way to see what groups are operating in your city. For example your city might still have student protest encampments for Palestine on university campuses. Unions and political groups go to these and put material up at these.

Do that Google search! Looking for leftist, socialist, communist, anarchist, or labour unions based on trade in your city is actually not a bad way to get started.

I’m new to direct action myself and others might have better suggestions.

It’s ok to start small, like a community garden even. These are all part of a broader network that you’ll have exposure to once you are looking.