Practicing could be a hard thing if you´re learning by yourself at home. You could be making the same mistake over and over again without realizing that you got into a never ending loop. This is the the exact most common problem for musicians learning by themselves, so you’re not alone!.
If you ever feel trapped meanwhile practicing your instrument, there’s this one thing you could do when practicing: Do the same movements you’re trying to learn but in the slowest way possible, and we’re talking about doing it really really slow, like turtle slow divided by a hundred, so slow that would be almost impossible for you to miss a note.
By doing this, you’ll have a clear notion of which movements are the most difficult, and then you can practice with a metronome to polish these movements carefully. Remember that is not a matter of going fast, but getting there…
There are a few resources on the internet that can help you with this. For example, get online and open one of these metronome pages: MetronomeOnline or WebMetronome. Free to use and great, specially the second one because of using both sound and color to play the tempo.