Earning A Living

Translated from letters of the Rebbe... Since in our world all things get better with time, you should not be overly concerned if your first job will be difficult or your salary will not be satisfactory, for this is but the beginning [of your job experience] and "All beginnings are difficult."
Even if you imagine that you are being taken advantage of, as your productivity warrants a better salary, still, bear in mind that this is but the beginning.
In the above matter, the teaching "A person is too close to himself [to be entirely objective]" also applies. You should therefore specifically seek the counsel of your good friends. After explaining to them the details and your reasoning, they will be able to offer you objective advice regarding your job.
Mikdash Melech, Vol. I, p. 236
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You write that for the time being you have not had any job offers:
In light of that which is explained in Kuntres U'Mayon, man must make a receptacle [for obtaining his sustenance].
It is therefore inappropriate to wait for others to offer you a job; you are to go out on your own and actively seek a job, particularly since this [i.e., acquiring a job] is more important to you than to other individuals, i.e., those who may offer you a job.
Igros Kodesh, Vol. XIV, p. 417
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In reply to your question as to what would be the best type of job for you to obtain:
Understandably, you should give priority to the type of job where you can best utilize your talents and knowledge.
Also, seek the counsel of your local good friends, as this will clarify to a greater extent the situation, potential jobs, etc.
Heichal Menachem, Vol. III, p. 179
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... Regarding matters of earning a living - it should be according to the advice of discerning friends. This is in keeping with the verse, "Salvation lies in much counsel"; which is to say, that the individuals offering advice are to be wise and discerning so that they are capable of providing counsel. And "much counsel" means that there be at least two individuals providing advice, as the minimum of "much" is at least two.
Moreover, they are to be "friends" - individuals who seek your welfare, for which reason they will give your situation proper consideration and offer you sound advice.
Sefer HaSichos 5748, Vol. I, p. 240
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It is regretful that you are finding it so difficult to accept the fact that you are having temporary difficulties in finding a job, although - unfortunately - such situations are quite common during present times.
We actually perceive that which is explained in the sacred books, that the more one increases his faith and trust in the Creator of the world, the One who conducts it with individual Divine Providence, the sooner will there come about an improvement in the situation, and the greater will be the improvement. The same is true with regard to your situation.
Igros Kodesh, Vol. XVI, p. 223
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It would seem that once again you are worrying, and central to your worries is the concern about the possibility that, G-d forbid, you will not be able to earn a living.
Understandably, it is quite disconcerting that you should be so concerned; surely that which is stated in Torah in general and in Toras HaChassidus [the teachings of Chasidism] in particular about faith and trust in G-d should suffice for you not to worry.
(As is self-understood, this in no way contradicts the need for making a "receptacle" via natural means, as the verse says, "G-d shall bless you in all that you shall do." However, this must be done in a manner of "By the labor of your hands shall you eat," i.e., that your hands should labor, but not your head and heart.)
This is particularly so with an individual such as yourself, you who have beheld miracles with your own eyes, miracles that transpired with yourself.
Now, all of a sudden you begin to worry if the One who sustains and nourishes everyone, approximately one billion eight hundred million people, will be able to sustain you and your family in an honorable and ample manner.
It would be a misuse of precious time to go on at greater length about something so obvious.

Igros Kodesh, Vol. XII, p. 198

From "Eternal Joy" translated by Rabbi Sholom Ber Wineberg, published by Sichos in English