They're fine for a first try back. It seems everyone on this site uses that very technique when beginning, gradient w/grunge brushes. Personally I'm not a fan, but it is good for opening attempt.
I'd say their is not too much to give advice on here. Just broaden your skill usage, remember to look through ALL available text fonts and most importantly, take your time. The majority of people on this site fail to do this and in the end produce lacking pieces.
Experiment and explore all the available options PS brings to the table to find a suitable and unique look on your graphics.