Welcome to the forums, this is a good start, but here's some advice:
1. Try some more complex backgrounds.
Your work is nice, but it's just gradients and fills, try some effects and renders!
2. Feather your text
Or change the opacity, it sticks out really obviously and is really too loud.
Now, as to the images themselves:
The first one needs text feathering
As does the second one, BIGTIME sorry.
The third one needs a background and feathering
I like the 417Dad the best, it's got the best feathering.
The last one again needs alpha mask or feather and a more creative background.
Keep learning and I hope you can gain some knowledge on this forum!