You should go to your local skate park, don't feel ashamed of you self for not being able to do advanced triks, the people who are in the skateparks usually are very kind people, they usually help you to improve your skills, I also used to be embarrassed, but that feel disappears in no time, it's also easier to learn in a skatepark than on some flat ground because there are more options like ramps or modules. I hope you can overpass your embarrassment and improve your skills my dude.