Okay, don't stress thats the best way to learn... There is no resources other the tutorials you will understand as this may be too complex for you.
First take it slowly and follow the tutorials, if you can't figure out the solutions look at the answers and see how you would do it differently or where you might have gone wrong.
At first, it will be difficult for new users as you won't understand the syntax and the Object Oriented Programming aspect which Swift heavily uses.
Follow the tutorial and challenge yourself, maybe changing a layout to different colour will make you think what code is doing what, at this stage you are still learning the concepts of programming.
If need any help just post here, you should take your time and understand it and then move on to the next tutorial...