1. Lower your expectations. It’s normal to not be able to get along to strangers, more so with someone you have no common interest / background.
2. People mostly only care about themselves, so it’s ok if they reject/ignore/rude to you. Most likely explanation is that they’re having bad day or just couldn’t help you.
3. Don’t try too hard. In socializing, it’s better to try out many times with low effort rather than trying to make a big shot.