Is this normal

Guys I'm a beginner and I recently opened a premium pack where I got immorticia the the next day I opened another premium pack and got grass knuckles I felt so happy and blessed as I got two heroes in consecutive packs. but as I'm a beginner I have no legendaries and im not that good in deck building .I use aggro deck of boogaloo which involves unlife and flamenco. should I stick with it or should make another deck for those two heroes and rank up I'm currently rank 14. Help me out guys