the best thing to do at home for traps are cleans. nobody online ever talks about cleans cause the younger guys who dominate forums these days are all about isolation movements cause that is what they see on youtube and other stupid websites.
i have massive traps, yes i have good genes for them but i built them from cleans. not from isolation lifts or shrugs. in fact I NEVER shrug. not saying it is a bad exercise at all, but you should do cleans first..