Developing true well-being begins with the heartfelt intention and commitment to do so. Mindfulness is the basic tool that will help manifest that intention by weakening unwholesome states, cultivating wholesome ones and amplifying the latter when they arise.
Sanna (pere arise together with feeling (vedana) and is a "marker" of sign and a "recognition" of the mark (sign). It can be used to protect/develop and understand mind's dynamic. What is needed for a beginner = mindfulness of the body.
We start with breathing mindfully to collect and calm the body and mind. Then the attention opens to include the changing flow in a spacious natural presence.