That feeling you've described, is an early indicator that you have successfully raised and channeled some degree of energy through your bodies meridians.
It's not an indication outright that your spell has worked, but it IS a clear indicator that you're on the right track in terms of being able to raise and direct the energies necessary for casting effective spells.
People experience different sensations when working with these subtle energies, but when I was first learning to work with them, I would often have an increased sensation of my etheric double, almost as if my aura felt more dense and palpable after a working.
I'd suggest forgoing the spells in and of themselves, and start working with your own energies, and awareness of them.
Learn to sense how it feels moving into and through out your body, and learn to use your will to direct it along specific pathways. There is a lot of reading material available online regarding different methods of energy manipulation and how it pertains to casting spells or performing rituals. Not all of it is advisable, but it's there for anyone eager enough to pursue it. Do your research, question everything, and experiment frequently, recording results and sensations for later reference. This type of energy work enhances most spells/rituals and often leads to passive forms of psychism that will serve you well throughout life. Think of your ethereal body as a muscle. Just like any other muscle, you need to learn how to work it, strengthen it, and properly utilize it.
You'll be glad you did.