My reskin mod not showing changed texture and crashing

[HeavenHeathen]

Hi! I'm new to modding and I've decided to make a reskin mod by another person's suggestion. This mod changes the texture of the football helmet icon, but it doesn't seem to work. I've put together all the standard mod files together, in addition to the changed texture so the autocompiler can compile it, but after viewing the item in-game, the texture didn't change (also, the mod icon doesn't show up). I don't know how to write code to enable my texture, so I looked up on the forums and added a couple of lines of code to the modmain.lua file and now it crashes upon trying to launch my world with my mod enabled.

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DST PvZ football helmet Reskin.rar