Personally, I don't believe there is a true 'beginning' that everyone should start with when first engaging in magical practice. As we all know, each person has an individual path in which they will travel their own way, which will perhaps be extraordinarily unalike from another person's, and thus, they 'start' metaphysical craft differently.
However, as Petulance said, spell casting isn't something I would suggest a beginner to start with.
I have found frequently a string of practices and studies commonly suggested as 'the basics' are pitched to a new practitioner. These are things such as meditation, correspondences, energy work, etc. Perhaps they are not 100% mandatory in order to gain success within metaphysics, however they most definitely are beneficial and would perhaps increase the likelihood of success.
Spells don't work for numerous reasons. However, you may find value in being patient. You'll find often spells don't hand it to you straight away on a silver plate; but rather they present you with the opportunity to make what you desired come true. Noticing that opportunity, on the other hand, is down to you.
Something also suggested by Petulance above, checking out the newbie central, FAQ and tips area of this site may be quite helpful to you. I'll link it here:
As for the basics, this is by far the best post I have seen on the topic:
However you may find more simplified articles within other areas of the forum and some members list the basics or suggestions for beginners on their profile.
Now, take it upon yourself to browse the forums, articles and perhaps join a coven if you wish to have direct contact in seeking help and advice and pick up any valuable information. Some site covens also provide lessons for their members.