Aeromar I would do the MCC for 2990€ at Sky4you in Berlin at Lufthansa Flighttraining they have approx 40 Sim there and do not do the JOC for 1000€ then before the interview you do 3 hours sim in dublin this cost approx 750€ in my opinion this is the best way to be good prepared and you not waste money.
You fly in the MCC 80% autopilot or flight director it is all about CRM
The 737 Sim is not hard to fly it is like a big Cessna 172.