I feel like the main thing stopping me from visualizing myself a better person is the fact that I'm not already where I want to be and thinking about the characteristics I want reinforces that I don't have them and previous embarrassing experience's. For example, if I want to visualize myself more confident in a room or good at talking to girls, immeditaely I'll have a mental block and start thinking, oh no that's not me, I don't act in that way, I don't feel comfortable asserting myself in a specific way(as I start visualizing) and just a general feeling of cringe and embarrassment that I'm "trying to be someone I'm not" and this is such a loser thing to do.

How do I overcome these thoughts and feeling about viewing myself in a better way?