Best way to set up tower defence

I am trying to create a tower defence and stuck on the spawning waves i did ask in another post but got a reply but not working the way i though or im doing it wrong
i want a simple wave manager to spawn waves i am doing this slow so just want to get the first wave before i get into the other 5
i have already a function that can call how many bots but for some reason in level blueprint when i call the function with simple move to location it will only move 1 bot and the other 4 are stuck in the spawning location
any help will be helpful is there a better way to set up waves