If your intention is to go forward and work in the industry as a fulltime DM or move up towards instructor. Then yes do the DM course. You will however not evolve your skills but more your dive knoweldge. Your skills should technically be well advanced prior to you entring your DM course. and the only way to do that is to dive alot and work with more skilled divers to get your trim, your bouyancy, your finning techniques all down solid. Entering the DM world, many will look to you and hope your skill set is superior or ELITE to them so they have someone to look up to.
Imagine if you will, you are working as a DM on a boat. Surrounded by poorly skilled divers whom need a guiding hand. BUT your skill set is that of a rookie aswell and you end up being surpassed by a seasoned diver whom is just out to have fun. His skill set is far superior to yours.
The point is, your skills MUST be set the bar. Your skills is what will make you a better diver. Get all the techniques down right. Take a more advanced training like the GUE-F course where your skills will be tested. anyone can read a book and learn dive theory, no one can master bouyancy, trim, finning style or even gas management by reading a book...get out and train, practice, work out be in the best shape you can be.
You do not have to be a DM to be a good diver. Diving with better divers makes you become a better diver.
Also as a DM you become a glorified babysitter to poorly skilled divers whom should be able to get dressed by themsleves. There is nothing wrong with helping folks out. But having to practically set them up and litterally hold there hands has they struggle to suit up. Then run out of air in the first 20 minutes of diving and you have to get there fat asses out of the water. And if your lucky you get a thank you and a big fat tip...most of the times you get nothing. But a sad story on how they we more in shape a few years a go and do not understand why they go through a tank of air so quickly...( um because you are so fat and out of shape, may be the cause..and them 5 cigarerttes you had prior...
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and yes CHICS love DM'S...especially if you are able to help them out...get them in the water, watch over them and treat them well...you will be well --um..rewarded...trust me.
Safe dives.