geryshayk How much have you paid? What does the contract say about leaving?
As long as you haven't given them much money, it's not the end of the world. You're not far in and could leave with little/ no consequence apart from the financial aspect.
Though it does serve as a warning to others. Why would anyone sign up to spend many 10s of thousands of Euros at a school of which they had no knowledge?
It's quite simple.
Go visit the school. Look at the facilities/ planes. Talk to the instructors/ sales/ receptionist/ anyone and everyone. Try to sit in on a class. Does it look well-run? Are the facilities reasonable? Would you feel comfortable in the planes? Do they have enough planes in good working order? Do the FIs speak English well and sound experienced and competent? Is information on the course easily accessible?
Talk to current students out of earshot of the sales people. Would they recommend the school? What are the main pluses and minuses? Is there anything they wish they knew before starting?
If you have contacts, try to get a personal review from someone at/ a recent graduate of the school.
Thoroughly search Google/ Facebook/ IG for reputation and reviews/ info from recent students (though take things online with a pinch of salt).
Never pay significant sums up front. Always remember you can lose what you've paid (too many ATOs have gone bankrupt so lots have experienced this unfortunately).
Buyer beware!
Edit to say this sounds a bit harsh. I truly wish you well and hope you are able to follow your dreams!