You were experiencing anxiety. You said a rational thought. A rational thought that is true, in a way, for anyone and everyone. "I allow myself to be comfortable." -You have the right to be comfortable. A rational thought that can become accessible because you are practicing therapy at home, beforehand. Most of us will need to practice this before we can access it, just as you did.
You ask how can you keep going with this method, specifically what sessions to jump to. I would not recommend jumping to sessions. You might have finished the series and be repeating it, so okay, then you move around and customize as you like. But, for my answer here, I'm speaking to everyone reading this who is going through the series, maybe for the first time. Do not jump around. That is one reason the sessions were not named by Dr. Richards to begin with. I've often wanted the sessions titled, and we are discussing this for future updates, but the reason he did not do this is because he wanted to reduce that tendency people do have, and have asked us, to jump to specific lessons or handouts when they think they see a title or theme that they want to go to first. They want to, naturally, get at fixing this problem faster.
But you can't do therapy that way. Go through the therapy step by step, in the way it's presented. A lot of thought, experience, time has been put into organizing the sessions they way they are so that you are building upon new skills and strategies. You do not leapfrog this process.
I think as you go through the series and look back, you will focus in on stronger parts/sessions/skills/handouts that do mean more to you. But those specific points also mean something because they were only able to mean something after you did the necessary work to allow that to be possible.
I do not mean to belittle your question here. This is a great question to ask for us all to remind ourselves.
For you, Jaleel_Blackwell, you have identified a strategy that worked for you. Consider why. Consider all the aspects of the therapy that helped this work, and what you have done up to this point. Reinforce that. Use that, for sure. Keep using it, along with all the other points you have covered.