Welcome to Spells of Magic,
Casting spells on spells is not recommended, it can be dangerous. That is why most people state you should cast one on top of another one until the first one works. If this is a spell to speed up the process of the other spell, it will not work, as spells will not work instantly.
If you are New to Magic
If you are new to magic, then you shouldn't do spells first, you should start at the beginning, the beginning would be, learning the basics of magic. Some of the basics are: Meditation, Centering, Grounding, ..etc.
You can find a lot of the information on the Articles and Forums. Magic is not a toy, Now many people take years before they practice spells, this is because they want a clear understanding of the basics. So, my wisdom to you is, don't rush, work at your own speed.
Now you may or may not get many of the practices on that day, that is why it's called practice. In the basics, you are suppose to practice on.