how to make an overlay that shows the player health amount and some other things

how to make an overlay that shows the player HP amount (cause don't want that hearts) and I want to make a stamina and level system, also tell if THIS will bring any entity and items in the radius to where the entity is (and tell if it won't brings the player too) in case of not, please send me one that can work, an tell if THIS would spawn the entity and what I need to put on the procedure to make it despawns, thx for reading