Re: I would appreciate some suggestions for improvement
You just need to force yourself to open sets. The more you open the easier it gets. The first few sets of the night are the most difficult, then it gets easier after that. What is bad about your opening? The most important thing is to make it look like you are not hitting on a girl with your opener. Then you need to keep going.
If you want to improve your openers then make a point to go out and open 20 girls when you go out. Instead of worrying about carrying the conversation on, just open them and then say "well you have a good evening after you open them up." It will help you get more comfortable. Also you have to make a point to not care if you get shot down or not. Seriously, everyone gets shot down sometimes, and there are many reasons that it happens.
There is no such thing as rejection, only feedback.
Be the flame, not the moth.