Both games you postet are not that easy to do!
You can see that there are a lot of game elements and menus. Also both games need a very good balancing and working algorithms. Game development isnt as easy as it seams. And making the game work is just 20% of work. You still need menus, highscores, settings, sharebuttons, finishing touches and connect your game to a store.
I don't want to demoralize you but I saw a lot of beginners who were trying to make huge games and ended up with nothing. Rather do something really really small and finish it.