There's nothing to fix on that tattoo. It's still healing. Tattoos look weird when they are healing. A lot of people say to give it 6 weeks to heal and then judge, but I'd given it longer, at least three months. It shouldn't be shiny or bumpy then.
Secondly, a tattoo is not a sticker. No tattoo is perfect. Tattoos do not heal exactly the way they looked when they were first done. Skin is a living canvas and that means lines often spread or color migrates. It would be ridiculous to go back to your artist to get that "fixed." If you can't live with minor imperfections, then tattoos aren't for you.