Making It Easier To Ask?

I'm looking for ideas for how to get out of my head and get over my irrational fear of rejection/judgment in order to improve sexual communication, and sharing one thing that workee well for me recently

My wife of multiple decades is lowish libido and is entirely responsive desire with no fantasies of her own, but is very open and accommodating to mine. Yet I often chicken out asking for what I want (in the moment or in advance). It is a combination of fear of rejection or judgment, and feeling bad that I am imposing my wild fantasies on her. Despite no really good reasons for me to have these fears. (I do suffer from anxiety to varying degrees)

We recently tried a new experiment during a period of increased free time to help me be more expressive that worked really well.

The rules were simple:

1. I say whatever sexual thought jumps into my mind, regardless of what it is, right at the time (within reason). No stewing. No overthinking how to bring it up. And no expectations that it will happen. Both vanilla simple things and wild crazy thoughts.

2. She positively reinforces that she is glad I shared with her, regardless of her opinion about what it is I shared or asked. And follows up with curiosity first (oh? not no!).

3. We discuss then or later, and bin things into do now, do later/sometime, think about it, or "no for now" -- and even then, think a little on whether there are alternatives for incorporating the fantasy without necessarily enacting it.

Basically by practicing saying many things, it makes each such thing lower stakes, and gets me out of a bad loop in my head.

Despite success with it, I still find each new engagement my first few things are hard to say. But each time it gets a bit easier.

What's worked for you?