do you have advice on a return to sender spell with bite that a beginner can do? I’m not advanced enough to something very baneful (everything I keep finding is for advanced practitioners 😭), but I also don’t want it to not have a nice bite added to it
The best thing I can recommend is something like a mirror jar. I've recommended this to a number of people for counter magic, return to sender spells, or simple protection from baneful magic. This post has one version of the spell that I've used in the past.
For something with a little more bite, skip the vinegar and fill your jar with mirror shards, a pinch of dirt from your yard, a palmful of peppercorns and mustard seeds, and nails or thorns. You can use decorative mirror tiles from the craft store if you don't feel like breaking a larger one for the spell. Seal the jar with wax or duct tape and place it where it will catch sunlight at least once a day, to reflect back any harm sent at you through magical means.
For added protection, you can bury a nail or railroad spike at each corner of your property, so long as you're not in a situation where you have to worry about the presence of iron.