I am a newbie here and hope that someone here can help me a bit

So how does this whole thing then work? I simply go to a MORE or maguiexpress store and buy USD nominated vouchers with my ARS!? Which exchange rate do they use for that conversion? Will they use the blue market rate to convert ARS into USD or the "normal" one?
After I got then this code then, I simply load the funds onto my UKASH account (which shows then the amount in USD) and from there I transfer it to CashU and then to BitCoin, right? How much in commission will this then actually cost?
Is this the only way to transfer ARS into USD or EUR? I wouldn't mind skipping one of those money services to avoid commission payments and directly transfer to a bank account in the USA or Europe - is that also possible?
Advices are highly welcome! Thank you very much in advance!!!