The answer is no. You don’t have to be born into a certain family or recruited by a coven to be a witch. If you have a desire to learn the magickal craft you can.
With that said, some people are naturally more in tuned with their spiritual side. They have always been able to feel the pulses of mother earth or reach out to the spirit world. If this is your case lucky you! Training in the Craft becomes that much easier. You have probably already learned how to shield yourself to make it through the humdrum of everyday life.
But, if you just want to connect with nature, make things happen for yourself, improve your quality of life through enriching studies you most certainly can learn the Art of WitchCraft.