I'm sorry you're finding it frustrating. A couple of general tips:
• Think about the top of the lesson. The Try Its and exercises focus on those topics. They often ask you to apply the techniques described.in he lesson and don't ask you to do a lot more. (Although you may need to do something several times.)
• If ou get stuck, read through the sample code and figure out what each line is doing. Also find the lines that demonstrate the main topics for the lesson. If you don't know what a line is doing, figure it out before you move on.
• You may need to reread or skim the lesson again. For some topics, it's hard to see why you do the first steps until you've seen the whole picture. In that case, rereding may help.
I hope some of this helps.