The local group here, last Saturday, they were on session 9 of the therapy, including the handout "Choose the Easiest Way to Begin Behavioral Therapy".
It sounds like you have already made some good progress - becoming more rational, using slow talk, already using these strategies in your daily life. As that handout explains we can try to apply that same step-by-step incremental approach we've been doing for the cognitive therapy when we feel ready to move that to behavioral therapy in the outside world.
You say that you would like to phone people up and arrange going out with them. If it's too big a jump, how can we break that down into smaller steps? Do you mean phoning friends up, coworkers up, dates up? I guess each one would pose different anxiety levels in different people. For you, who can you potentially call up that would be a smaller step? Potentially, if it's also phoning that is anxiety causing, you "practice" phoning something perhaps "safe" like an anonymous help line, support line for a product you bought, the library to ask a question or more than one question - setting a goal for yourself to use slow talk. Here you'd be breaking down the calling part into smaller steps if you need to. Practicing is not silly. Practicing is good. If it's not the phone part you need to break down as much as the phoning + proposing getting together, which person can you think is lower on your anxiety hierarchy, "safer" for you to call? Which person would you logically have a reason to call and propose an easier situation to meet up for? That could mean your proposal to go do something could be logical and therefore put you more at ease to practice this, or it could be a proposal for a person who is pretty easy-going anyway and doesn't need a big reason to meet up.
If this is work related, if that's what you would like to work on for your behavioral activities, we often don't think this enough, but - people often liked to be asked stuff. My sister is really good at having "mentors" at her work. I tend to think I shouldn't bother someone. But those mentors really benefit from the relationship too. They like to help people, and from what my sister has told me, she ends up discussing life concerns and general worries... general small talk, not just straight work-related topics, as you can imagine, because people like to talk. People like to help.
I see that yeah, you don't work with a huge number of people, and you say you had a bit of anxiety talking with your boss. What about the other 4? Do you feel that you could approach them easier, call them? Do you have a simple reason to propose a coffee and chat about work, or just a coffee and a chat because in a small company and working from home, people do understand the need to want to get out and actually be social. In my last job, there was sort of a core staff, and then you had us - the few part-time out-sourced employees. So I worked on my own a lot too, as you describe yourself. I found myself missing having some sort of colleagues simply because colleagues are where most of us get a bit of social interaction a day. I asked one of the other part-timers out for just the purpose of having a coffee and shooting the breeze. This was after a while of knowing him not too well but being polite in passing. He was also happy to go for a coffee since he was in the same sort of situation I was in - busy but not really meeting people in his day.
So I have not really answered your question well, but want to hear what you think. How can you break this down, knowing the people there and the situations you could approach now easier? This is a good topic for all of us to see, as we all need to approach this and it's good to have feedback on brainstorming ideas. In fact tonight is tonight the local group is getting together for this reason. They've done behavioral work before, but tonight in keeping with the session 9 material, they are approaching these real world behavioral activities and thinking of how they can break down a larger mountain into steps.