Solved Upgrading System problem

[WiebeHero]

Hello everyone i am WiebeHero and i made an upgrading system for well my server that im creating but i got a few questions for you guys here is the code that i have now:
on inventory click:
if name of item is "&7Stone Club [Lv 1]":
if the 6th line of lore of item contains "&7Upgrade Progress: 0 / 2":
if player has 2 stone hoe:
remove 1 stone hoe from player's inventory
give player a stone hoe named "Stone Club [Lv 1]"
set the 1st line of lore of the player's tool to "&7Confusion I"
set the 2nd line of lore of the player's tool to "&7---------------------"
set the 3rd line of lore of the player's tool to "&7Attack Damage: 8"
set the 4th line of lore of the player's tool to "&7Attack Speed: 0.4"
set the 5th line of lore of the player's tool to "&7---------------------"
set the 6th line of lore of the player's tool to "&7Upgrade Progress: 1 / 2"
set the 7th line of lore of the player's tool to "&7Rarity: Common"
set {_damage} to 8
set {_speed} to -3.6
add "{AttributeModifiers:[{AttributeName:""generic.attackDamage"",Name:""generic.attackDamage"",Amount:%{_damage}%,Operation:0,UUIDLeast:324464,UUIDMost:154531,Slot:""mainhand""},{AttributeName:""generic.attackSpeed"",Name:""generic.attackSpeed"",Amount:%{_speed}%,Operation:0,UUIDLeast:8055,UUIDMost:772149,Slot:""mainhand""}]}" to nbt of player's tool

So thats the code and here is what i still want it to do and what the issue is:
1. I know the give command and how to change its name but i dont know how to set specific lore lines to it set the 1st line of lore of the player's tool to doesnt work sadly.
2. Does anyone know how i can get the unbreakable tag? XD
3. It would be handy to know a command to remove this anoying nbt with tags like for 'Combat' or "when in main hand" and that kind of stuff.
So can anyone help me with this? would be much appericiated!

Best regards,

WiebeHero

 

[Donut]

To signify a new line in the lore use ||

So for example:

set lore of whatever to "this is line 1||this is line 2"

#to have a space between the lines
set lore of whatever to "this is line 1||||this would be line 3"

 

[WiebeHero]

Thank you!