If you have time constraints, then just go for the DM course, just understand that most likely you will not improve your skills - you will mainly learn how to handle customers.
Personally, I sincerely disagree with divers becoming DMs before mastering skills - if something serious happens, you need to be able to manage the situation, which could prove hard without solid core skills (those three I mentioned above).
However, you can just identify a good diving school, do a dive to check your actual level, and if the course director is fine you can start your DM course. If the CD is not fine, you may need further training before going for the DM route.
In my opinion, if you can do the following exercise with the level of buoyancy/trim control shown in the videos while maintaining awareness of your team, you should be fine:
Anything less than the video above and you should think twice before becoming a DM. No need for the tec configuration in your case: the wetsuit and single tank should work well. Most likely, you won't even need the long hose, although I personally think it is a good idea for a DM. Also, BP+wing is likely not necessary.
Any good instructor will bring you to this level, from whatever agency.
[NOTE: to make it clear, I only dive long hose and BP+wing, I can only see advantages in this configuration - but you won't die if you use something different and I believe you should choose based on your needs, so giving you an overview of all potential options is just fair]
You probably have a good idea for your next steps at this point (depending on your time/money constraints), except for how to choose a high-quality instructor most likely (don't take it personally: if your dive count is right, you likely don't know enough yet because 50 dives is a very little amount, that's it).
Choosing the right instructor is an entirely different thread -> I suggest you use the function search on the forum, and if you don't find what you need open a new thread.
Feel free to send any of us a PM, we will support you the way we can