Congrats on your 55g. You can do so much with that size.
Maybe try a theme tank. A tetra tank, a african tank, a cichlid tank, ect....Maybe....
My 55g took 4 weeks to cycle. During that time I travelled to my LFS and wrote down what fish I liked, then went home and researched them. Found area breeders. ( did find a area angel breeder ) That was the longest 4 weeks ever. I am not a patient person. But I did it.
Have fun with your new project.