How do you learn faster? Take it slow and easy!
You will need to constantly remind yourself of these three things if you don't have a teacher to do so.
1. Start Slow
The secret to playing that part cleanly and clearly is to start slow. Play the part very slow and then gradually bring it up to speed as you start to get it down.
2. Play in time, with a steady beat
If it's the most basic strum you are learning, start very slow and count evenly. 1, 2, 3, 4, 1, 2, 3, 4, etc... and strum along.
It would be most helpful if you had a metronome to play along with. A metronome has a steady clicking sound that you can play along with. You can adjust the speed of the clicking so that you can play slower for faster songs. A metronome is the best way to make sure you are keeping steady time.
3. Take it one step at a time
Playing the songs will be your practice, and it will help you to get down the rhythm you are working with as well.
For example; in the Free Play ukulele NOW eBook, you'll learn two chords and a basic rhythm. You'll then have quite a few songs that you can play that use just those two chords and that basic rhythm.
In the Play Ukulele NOW Method and Songbook, after you get better at that basic chord change and that basic rhythm it's time to add a chord that works good with those two chords, and then you'll have some songs that use those three chords to play. After you get better at that ti's time to look at a little more advanced rhythm or strum, etc...
It is important that learning is like building blocks and each thing builds a little bit more on what you have already learned. It is important have an understanding of the step you are on before you move to the next step. This is what the Play Ukulele NOW Method and Songbook dose.
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The Play Ukulele NOW Method and Songbook teaches Ukulele one step at a time quickly and easily learn to master chords and rhythms, click here to get yours