What do you wear on the beach when you go on holiday?
I am wearing flips flops, swimming trunks, parassol, and I have a towel with me; I also want to catch a wave.
Hey, really good job, just a couple of small things.
First, a parasol is like an umbrella, i.e. it is not something that you would WEAR.
Second, just move the word 'and' to before the word 'towel'. The towel is the last thing that you wear, so use the conjunction 'and' to join it up to the rest of the sentence.
This leaves you with: <<I wear flip-flops, swimming trunks AND a towel after catching a wave.>>
Great job overall.