I greet u.
My latest (WARNING I ONLY STARTED MAKING SIGS A MONTH AGO)
Try not to use blending effects on your render and mostly anything except text. In some cases you can use blending effects on text but just make sure it looks good. It's not bad for a beginner, keep up the good work and keep posting your work so we can see your improvement and help you out a bit.
Also another thing I would like to add: Your boarders need to be solid. They contain your picture and it's just not a boarder if it has low opacity.