It's understandable that you're apprehensive - it's always difficult for a parent to send their child off into a new and unknown environment, and even more so if you are aware of potential pitfalls, and yet more so again if you have bad memories from your own childhood. But your daughter isn't you, and I think you are already aware that you are perhaps putting your own bad memories onto her.
From what you say, she already has good experiences to take with her into kindergarten and to develop in this new setting. Try to be positive and focus on encouraging her and listening to her experiences, rather than dwelling too much on your own.
My son's experience of school has been radically different from my own. When he started school I, like you, started reliving my own bad memories of school, but he has a very different personality from me, and also the school environment now is very different from when I was at school. He loves school and runs into the playground every morning. He doesn't have a lot of friends, but he does have a small group, and his interests in Pokemon and collecting football cards mean that he has a way of engaging with the other children who aren't part of his small group.
Try to be positive about this, and keep actively engaged with the kindergarten staff and with your daughter. That way, if there are any problems you should be aware of them early on and ensure that they are dealt with.
I hope it all goes well, and that you and your daughter enjoy this new stage in her life.