> I don't know if I will actually be accepted there (there is a probation period of 3 months).

Depending on where you live 3-6 month probation periods can be completely standard. If you get the job, you are accepted there. The probation period is just a window in which you and the company can separate with less friction. In most places it's a formality that you shouldn't worry about unless you're extremely underperforming or doing something egregious at work.