If you're looking for manga similar to Fairy Tail: Happy’s Heroic Adventure, you might like these titles.
A boy reincarnated in a different world aspires to be an adventurer, but his body is that of the weakest race of cat people, and the magic he wields is an empty attribute that is ridiculed as "empty". However, the boy ignores the big handicap and uses his ingenuity to create weapons and armor from sky magic, transforming it into magic that allows him to walk in the sky. When he grows up supported by the kindness of those around him, and when he realizes the true value of the sky attribute, his journey as the strongest catman adventurer begins!
In Durhein, known as the "Country of Beauty," magicians governed under the peaceful rule of King Al-Aktha. One day, a strange light fell from the heavens, turning all the magicians into cats. From thenceforth, magic was oppressed. No one knows why such a terrible thing happened. The world's only hope is one once known as the "Magician of the East;" now just a cat called Ghee. Ghee and his companions set out on a long, tireless journey to bring back a world filled with hope...
Setsu is a high school girl who is summoned to another world. But it seems that she was just caught up in the summoning of a "hero"! She is banished from the royal castle for having no talents, but somehow manages to start a life in the royal capital. But living on your own for the first time can be tough. The food tastes terrible! And she also fails miserably at her job. But then her talent as a magic item craftsman is discovered!