Hi Christina, the island in the first one looks good but a little Local Contrast Enhancement might also help. For me, the sea and sky are overly bright and lack detail.
In the second one, the top of the sky is strangely dark.
The Dreamy Effect usually doesn't work well on flat surfaces like this water because it needs high contrast and a sharp image to really work well. It would work better on the forested areas but to be really effective, the camera should be closer to the foliage. Glad to see that you are trying it out though!
For both of them the treatment could be appropriate if they actually looked that way when you shot them and if that is the way you want them to look.
If you get a chance, take a look at
this site. Pick out the landscape images and look for the compositions that really work well for your likes and goals, then with camera in hand, search for similar scenes to capture. There are over 1,500 images at this location but they are quick and easy to skim through to find the landscape images. Hope this helps!