Why not? Any lay people can be enlightened. Not necessarily the monks or nuns or teachers. It takes tremendous merits to practise and shake off the baggages viz negativities, habituations, etc to become enlightened. We have to be sincerely and consistently work towards it by holding our vows, applying the Eightfold Path...the eight steps comprising the path in a practical guide to ethics, mental rehabilitation, and mental reconditioning. By achieving these eight steps, one will eliminate all suffering and reach the desired state of Enlightenment....
Right Understanding
The Right Understanding is crucial, particularly the identification, causes, consequences of, and through these eight steps, the elimination of suffering. The Right Understanding also conveys an understanding of the non-permanence of the self.
Right Thought
To have the Right Thought, one should fully understand his purpose in following the teachings of the Buddha, as well as his outlook on the world and world issues.
Right Speech
The focus of the Right Speech is to avoid harmful language, such as lying or unkind words. It is far better to use gentle, friendly and meaningful words, even when a situation calls for a truth that may be hurtful, despite the follower’s best intentions.
Right Action
The Right Action forms a list of fundamental ethical behaviors one should follow. These are the Five Precepts:
To refrain from destroying living beings
To refrain from stealing
To refrain from sexual misconduct (adultery, rape, etc.)
To refrain from false speech (lying)
To refrain from intoxicants which lead to heedlessness
Right Livelihood
Those seeking enlightenment should pick the Right Livelihood to support the other fundamentals of Buddhism. One should avoid employment in positions where their actions may cause harm to others, be it directly or indirectly.
Right Effort
One recognize that human nature limits the mind at times and causes ill thoughts. Unlike Right Thought, the Right Effort focuses on working to remove the bad thoughts and replace them with positive, more pleasant thoughts.
Right Mindfulness
The Right Mindfulness, along with Right Concentration, is the foundation of Buddhist meditation. Monks, or other followers, should focus their minds on their body, emotions, mental workings, and mental qualities, but not on worldly desire and aversion while meditating.
Right Concentration
Coupled with Right Mindfulness, Right Concentration lays the framework for proper meditation. Rather than focusing on the mental aspects, the Right Concentration gives instructions as to how to work through the steps of focus in effective meditation.