If you want someone to teach you, you should book lessons with a professional teacher: https://www.italki.com/teachers. It's difficult to find German language exchange partners and language exchange partners are good for conversational practice but you can't expect them to really teach you a language. It's also better to first have the basics of a language down, before starting with language exchange. 

Here are some good resources that can help you with studying German:

German courses on Deutsche Welle: https://www.dw.com/en/learn-german/s-2469

Learn German with Jenny: https://www.youtube.com/channel/UClBrbJXNh2sFxOuvH4o5H9g

The blog German is Easy: https://yourdailygerman.com/