Creating a plugin for a minecraft content creator SMP

I hope it can be within the price range but my idea is relatively simple, every time you die your max armor bars decreases by one and if a player was in the kill credit that player gains one, if you have 0 max armor bars you cannot get any armor protection and it's multiplied smaller and larger for each armor bar you have, for example, if you have 5 max armor bars you would have half the protection you would normally have from whatever armor you're wearing (if you don't have any armor it doesn't change) and if you have 20 max armor bars you get double the protection from whatever armor you're wearing there is no death banning however please try not to let any bugs slip through, especially make sure that if a player has 0 max armor and he is killed that the player who killed him does not get any armor bars and that you cannot get any more above 20, also make a command any player can use called "/withdraw" which removes 1 max armor bar and gives them an item called "protection rune" textured as a rune with a shield engraving on it, which when right clicked will be removed and give the player who used it an extra armor bar. (make the plugin primarily work on somewhere above 1.18 but below 1.20) I hope this isn't out of my budget or too difficult a task, please message me on discord, user: bobithyiscool as you may be expected to do a few bug fixes if some are found after and if you'd like you could even be an admin on the smp. make the plugin a plugin and not a mod if possible and make sure it will work on bisecthosting. thank you