The 2nd house is the house of resources. Money, attitude towards them, as well as accumulated resources, health, energy. The 2nd house is a very practical house. Accordingly, Mercury in the 2nd house will show us a person with a practical mindset, and this is his main resource. He knows perfectly well: how, when, and what to tackle in order for the idea to bring the greatest benefit and efficiency.
He excellently evaluates his mental potential and will use it for the sake of the cause. He is a person who understands how to earn with it, where to apply his knowledge. Earnings will most often come through intellectual activity, or if it is another area, he will calculate everything - whether it will be profitable for him or not. He is a realist and knows how to apply his knowledge and skills correctly and practically.
He can earn through intellectual or commercial activities, as well as in the field of education and with the help of trips.
Such a person knows how to reasonably and rationally manage his finances and material goods. And even if he is not very wealthy, he usually has enough for everything.
In terms of contacts, these are most likely connections that will bring him real results, or people on whom he counts, with whom he can have business relations. This is neither good nor bad, it's just that his thinking is most effective in this area.
In terms of health, for a person, breathing and being in the fresh air are important. Since he receives part of his energy from the air.