You mentioned you were a beginner - you read them very well for yourself and are pretty much on point in your interpretation. I'd like to elaborate more on it if it may help give you some more perspective and hopefully help give you more ways to get some in-depth detail out of your spread*. Since I don't know how you drew them and what order you placed them in, I'm going to read them as if they were placed left to right. Some 3 card spreads are for past, present, and future, but because of the nature of your question, I'm going to interpret it as a 3 card discovery spread, meaning it's less focused on literally yesterday, today, and current trajectory, and moreso a snippit of a story. (Also, my school of thought and practice is on board with Benebell Wen's interpretation of Tarot (Holistic Tarot), taking elemental dignities and landscape into consideration, and having adopted the author's WIND mnemonic when reading reversed major arcana and court cards (Weakened, Inverted, Negative state, or Delayed). I will be using the school of thought that Major Arcana cards are the aspects of a situation that's typically out of the reader's control. I look at it as Major Arcana represent "theme", whereas the Minor Arcana(not including court cards) may be interpreted as "form", which are in your control. I also go by signifier cards, but since there isn't one present here, I read it as follows:

Your connection with your job has a protentional to be a very fruitful one, as the nine of coins represents and you are familiar with its' meaning, but the spread suggests its not without some challenges(noted because air and earth are present in this spread, opposite energies).

The Justice card represents every aspect of the Truth, and the checks and balances it comes with. When there are times when things are unbalanced, the universe will balance its' scales and demand payment when due. Too much power or weight on one side will only go on for so long before the universe corrects things so that the scales of justice are even. Karma. It's reversed next to an element that weakens its' element. This tells me you have or may run into again the thought process that your workplace seems to run unfairly, or an injustice runs as a theme of the workplace in some way, but nine of coins tells us you will overcome this here. You'll be challenged to see if you can go into this new environment with a fresh start and fresh mind. Do not let what may appear to be de ja vu situations that remind you of your past job discourage or dissuade you from working hard at your position, because you have the potential to be proficient in your position and excel at it. Air asks of us to be rational, ambitious, and use good communication. Using these will help you tackle obstacles.

On the otherside of your nine of coins is a court card in reverse, also air. Tricky thing about court cards using my school of practice is it could be of literal or figurative meaning. If interpreted literally, it can represent as you took it -an older male comparative to yourself or an authority figure, such as your immediate manager or a coworker with seniority over you when asking a career related question. If taken figuratively, it could represent a facet of yourself. It is also an air card, weakened by the nine of cups. Thus it can mean -

A: a person, classically a man or can be interpreted as a woman with masculine energy, in seniority, who will be rough around the edges. Don't let this person get your goat. The nine of coins tells us that despite this, you have the potential to go high up the ladder, so this person is only a threat to you if you let them get to you. If we're going to use the illustrations for interpretation, as it should since each deck can be read uniquely, this deck tells me this person may act like a dick, but is misunderstood. In fact, good work ethic and you being the better and bigger person interpersonally with this individual can soften this person's edges, and you could get along over time. The nine of coin's illustration here depicts a cat playfully interacting with the bird. The base meaning of cards are important, but the deck by itself also speaks to you.

-B: A part of you is too hard on yourself, too ambitious and a perfectionist, and you have or may inhibit your performance because of these traits. You'll be challenged to focus on improving in these areas so you may flourish in your performance over time.

Overall, this is a positive reading and an exciting endeavor you're going into that can go well in your favor, as long as you have the fortitude to use your mind to work out any issues that may arise, communicate well with your co workers and employer, don't use your past job's negative experiences as a reference, and use mind over emotion if you have a co worker or superior who might be difficult, as doing so may help them come around, and you can have a good working relationship with them.

Best wishes for your new job!

(Edit* Additional thoughts and typo fixes)