I don't know what to say, but be confident. The fact that it is super vivid shakes your confidence in the fact that it is a dream. When it is blurry or a little bit of unawareness sets in, then you start thinking "obviously I can do whatever the frick I want!" when it is super realistic and everything feels exactly like it does and looks exactly like it does in real life, the idea that you could change that seems crazy.

Some dream powers you are super confident, enough so that it breaks through the confidence breaker that vividness has on you.

Hope this makes sense. After a while of breaking through this and being like "I FREAKING DO WHAT I WANT!" you should be able to have the confidence without trying.

I had this problem for a while. It wasn't until a couple months ago I realized that I was cured when I was water bending 3 ponds and TKing 3 houses in the air while transformed into a wolf with perfect clarity. I was like "I REALLY AM A BOSS MASTER!" haha.

You can always try walk control though. This helps anything that I struggle with. About to make a thread about it.