As far as I know, there is no illegal way to open carry short of walking around pointing the muzzle at people. The Mississippi Constitution does not allow for the regulation of open carry, or more precisely only allows for the regulation of concealed carry. So as long as the firearm is not concealed, it is legal to carry in MS.any classes i can take to let me know the legal way to carry openly. and that teaches the laws on open carry and where to carry.
Having said that, I cannot emphasize enough the importance of at least having some training before going about armed, and I would say that is especially true for new gun owners. Making the decision to be able to defend yourself or others with a firearm is of course an individual right as well as an individual responsibility. That particular responsibility is a very serious one, and should you ever need to fire that weapon, you can bet law enforcement will take a long hard look to determine if you exercised reasonableness and responsibility in that action. Therefore, at least some level of training would be prudent.
I am not aware of any classes that are specifically for open carry, maybe some others in this forum are. However, you could take a class designed for concealed carry, just for the sake of taking the class. You would not HAVE to get the firearms permit. If nothing else, this would give you the basics of firearm safety, some education about the applicable laws of the state, and some range shooting with your firearm. This would far far beat nothing at all.
Also my advice would be, at the very least be intimately familiar with the firearm you intend to carry. So much so that knowing how it operates and what to expect from it is more instinct than a thought process. Then temper that instinct with as much practice and knowledge as you can get.
I applaud you for wanting to get some training. Although perfectly legal to carry in this state without it, you are carrying a tool that gives you the capability of depriving someone of their life in a split second. As for me, even if it were legal, I would not fly an airplane or perform surgery on someone without any training, because I might unjustly kill them or myself while doing so. Neither would I carry a firearm without some knowledge and experience about using it.