So crypto man, basically in forex, commissions are applied on the trades by two ways; zero commission where you will not be charged for any but the spreads you will get, are little bit marked up and on the other side some brokers charge commissions based on the lots you trade but in this case you will get spreads as narrow as possible. I always prefer to trade with brokers who charge some amount of commissions on the trade as this gives you an advantage of tight spreads which is very important for the costs associated with your trades. You can see this thread for some good brokers:
https://forums.babypips.com/t/list-of-best-regulated-brokers/602005
Here you will get some really good options for both zero commissions and low commissions brokers.