How can I become less socially awkward and more “cool” after a sheltered upbringing?

I (22F) was raised in a conservative religious home, sheltered my entire life. I have come to realize that I’m really sheltered and it shows. When people meet me, they automatically assume I have strict parents.

I carry myself with a lot of uncertainty, because I am a very anxious person due to lack of life experience. I have been asked if I was raised Mennonite before because of my slow speech and prudish ways of speaking. I have been trying to get out of my comfort zone as much as possible. Whether that’s walking into a store and buying makeup or a bottle of wine without trying to feel guilty about anyone seeing me or talking to people who have different life experiences. I try to dress in a way that represents myself rather than just being modest and copying what I saw in the church. I’m trying to beach out and enter the dating world but I always feel inadequate, like I’m nerdy or uptight when I reveal my background.

I’m reality, I’m not like that at all and inside I’m a very fun and open minded person. I just continually carry this shell wherever I go and I can’t seem to shake it. I know that I’m young but I feel like I’m not my authentic self and there’s a part of me that’s still seeking approval of my parents out of shame, fear, and guilt which limit my social awareness.