If you are looking for a quick command, this is the wrong company. Commands are strictly on seniority list and there are lots of experienced FOs.
Its difficult to give an estimate, but I would say 3-5 years minimum, of course depending on fleet expansion.
FO salary is around 6300-6500€ 14x per year on which 13. and 14. salary is taxed with just 6%, you will end up with around 4200-4500€ net per month,
but you might pay additional tax in your home country, depending where you live.