Hi Saige! Excellent questions.
Those are all great offerings for Freya. You can also add a picture of Her!
Depending on what your offerings are, you have many options. If it’s herbs or oils 
, you can burn them. You are then releasing the essence of the offering so that it reaches your deity.
If it’s food, 
it can be eaten, but also burned or buried. Sharing a meal with your deity is a sign of being at peace with Her, or an invitation.
I like to take a piece of tonight’s dinner and place it on the altar, then I throw it away the next morning. But eating the remains of food offerings and libations is always an option!
You can read a recent conversation we had in the Forum about this clicking here.
When you offer a piece of jewelry 
, you may stop wearing it to symbolize that it’s no longer yours, but Hers. You would instead keep it as a personal reminder of your connection to that deity.
But your Craft is yours only, these are just ideas and you should experiment with them!
Read this post also: Offerings at Home by @MeganB