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Nitric dissolves Copper extremely well but I would have to assume unless you are in a lab that Concentrated Nitric Acid is out of your budget for a little bit of electroplating
Don't need the H2O2 it just really speeds things up, you can get by with the vinegar alone oxidizing the copper but it's much much slower
sorry if I'm too late but you don't NEED the peroxide it is just an oxidizer to speed things along. Warm the vinegar by leaving it in the sun or somewhere nice and hot but don't boil it, and the copper should dissolve a bit slower but it will, trust me