With your level of experience I think Convicts would be the best fit for you. Just know that the fry are often very hard to get rid of. You can rarely sell them. Giving them away to an LFS or to some friends will help you unload the numerous fry. Stick with the Convicts and learn how to properly care for fish. This will prepare you to care for more difficult fish in the future. Another good idea is to read, read, read! You can never know enough about Cichlids and aquarium maintenance. I learn new things all the time from books, magazines, online sites, and other hobbyist. Studying the numerous sources of Cichlid information will give you a wealth of knowledge that will make keeping fish and making smart decisions a lot easier.