It’s nothing, what else do you expect others to say? You fired someone, and they took the initiative to welcome you back at any time, which means they don’t mind.
Then don’t mind. People should not worry too much about these details sometimes. Since there is no job now, it is even more important to go there
We are human beings. If you don’t use them for a day, it is a waste. You should go out and practice more and learn more. , since you said that the company is promising, then don’t be afraid of hardship, study there seriously, work for a few years, and make a name for yourself, believe in yourself, everything depends on the effort, come on