Thank you! I'm not sure I really have enough insight or wisdom to put together a thread on how I did it but I'm happy to explain here how I did it.
First off, it's always best to get a captive bred from Biota or ORA. I've heard plenty of stories of the wild caught fish not doing well and it just feels deeply unethical to me.
Anyway - Prior to getting the fish, I decided on setting up a little IM15 tank that would house them for a while, to make sure they were healthy and unbothered when they arrived, and to let them grow out a bit before they went into the main tank. I set the tank up with some live branching Aussie rock, and also took some rock from my main tank and popped it in there to build up the pop population. I put in a few basic corals just for the sake of biodiversity(some xenia, green mushrooms, zoas and a toadstool). I had some promo for AlgaeBarn at the time, so I ended up getting like 6 containers of pods for $100 and dumped them all in the IM15. The tank sat for like 3 or 4 weeks to let it settle and to let the pop population explode. Didn't really need to cycle as it was all live rock but none the less I waited a few weeks before ordering the fish. I also kept the flow very low in this tank, I replaced the return pump with some Sicce pump and turned it as low as possible. Probably didn't need to be that low but I wanted them to have a calm experience.
When the Mandarins arrived, they were barely the size of my fingernail. I was prepared for tiny fish, but these were super tiny. They were very grey colored and took a day or two to really start moving around but they eventually became very active. Seeing as I put them in a very natural and uncontrollable environment, I wasn't able to really train them on anything, so I just relied on the pods to feed them. Once I got these fish, I also started seeding my main tank with pods once a month so I would typically use half of one of the bottles to replenish the Mandarin tank as well, but that tank was absolutely crawling with pods - glass was covered in them daily, there were all sorts of feather dusters, clams and what not living in there. It was a great space for them.
I don't remember exactly how long I kept them in there, but it was probably around 2 months. I planned on keeping them in there longer, but they were growing really well and honestly the super low flow of the tank made it a detritus magnet, and it was difficult to keep the sand bed clean. In any case, they moved into the 60 gallon main tank and have been growing strong since.
Since moving into the big tank, they've also started eating frozen food and live black worms, so they've got a good diet going. I still dose pods monthly though just to keep the population up. They do their little mating dance at night often but I don't think they're quite ready yet to actually produce anything but hopefully soon. They'll be a year old in August.
Attaching some pics I just took of them today. Let me know if you have any questions about them!