Ketu represents past life expertise, spine, scissors, spirituality, sacrifices. First house is the Dharma bhaav, denotes the soul and personality of the native. It also called Ascendant/Lagna.
Such native with ketu in first house keeps on doing the work or any activity without knowing the perfect reason of doing it that why is he doing it. And what will be the consequences or results of that work will be. So, such a native is always confused about what and why he is doing. Reason behind their confusions is that planet ketu represents the body it has no head. So such native is not able to think properly.
According to Geeta Chapter 6, Shlok 35:
असंशयं महाबाहो मनो दुर्निग्रहं चलम् |
अभ्यासेन तु कौन्तेय वैराग्येण च गृह्यते ||
Shri Bhagwan Explains to Arjuna that undoubtedly one’s mind is uncontrolled because it is very inconstant. It is only in your hand to control it by doing practices regularly and being detached from sense objects.
So by this shlok i want you to explain that such natives can reduce their confusions by regularly practicing yoga , meditation of any other type of exercises which they life. Condition is that they have to be very consistent.
Such natives have interest in hidden and occult knowledge like astrology, numerology, reiki etc. Also, their health get affected in no time if they become careless. So by changing their lifestyle and eating habits they can reduce the health issues.
Ketu placed in the first place can disturb their married life as well in one way or the other. Whenever their is a big fight/misunderstanding with your spouse, Just by doing yoga, meditation/ exercise you will see disturbances in your married life are getting away gradually. You just have to work on yourself.
Such natives have very high intuition power. If their good yogas of education in their chart then such natives can become big and famous engineers, software developers or scientists. Their interest in spying and detectives is also seen. Either they may opt this as their profession or may read/write blogs on them.