Get real and be honest with yourself.
At first talk to yourself and get some honest answers. Every guy knows the type of girls he is probably able to seduce.However, some choose to ignore this fact and approach girls who are not in this “area”. That brings rather frustration. Also you have to understand that it will take time to get better at flirting.
Thus, it’s much easier at the beginning to get started with women who are more likely to get attracted by you. Saving the ones who are bit beyond your league might be a good idea until your skill improved.