Ferber method advice?

My baby will be 6 months in a few days. He is a stage 5 clinger, breastfeed during night and we co-sleep. He’s been waking up so many times over night to feed and EMW for weeks now. Im exhausted (We also have an almost 2 year old). I’m ready to try the ferber method. He usually wears Merlin’s magic sleep suit. Should we switch to a sleep sack? Also best sound to put on the noise machine? Night light or no? Any advice is appreciated!! Thanks in advance!