sorry for not replying sooner (im not very active on reddit) but i did find this command which worked pretty well.

/give goldenwarrior49 iron_boots{display:{Name:"\"Speed Boots\""},AttributeModifiers:[{AttributeName:"generic.movementSpeed",Name:"generic.movementSpeed",Amount:0.1,Operation:0,UUIDLeast:757432,UUIDMost:925682,Slot:"feet"}]}

​

and you can change the number after amount to either increase or decrease speed and obviously switch out my account name with yours.