Yes, checking the rules beforehand is always worth it — minimum amounts and processing times vary quite a bit from one platform to another. From my experience, the clearer platforms are upfront about exactly what the limits are and how long transfers take. One I have found straightforward on this is
https://mostbet-203.cz/, which operates under a Curaçao eGaming licence and handles CZK transactions with no fees, typically processing payments within a few hours. Knowing those details ahead of time avoids any surprises when you actually go to move your balance.