Two different problems

Problem 1: my custom block does not want to work under any criteria, I put the texture on it and I also put CUTOUT and CUTOUT_MIPPED and it only gives me the broken texture (it's a heart, could it have to do with the pivot points?)

problem 2: how do I make an entity like a vex? That is, it crosses blocks but I want it to be able to attack me and I need to be able to collide with the entity because it is an entity that when colliding with the player becomes their pet

I also have other unanswered questions that I hope can be answered

https://mcreator.net/forum/70036/how-do-i-increase-player-life-healt-bo…

https://mcreator.net/forum/70070/can-you-make-cosmetic-armor

https://mcreator.net/forum/70071/how-do-i-make-entities-whiters-skulls