PlasticBag25

I’m a bit of a tattoo novice so sorry for the amateur question(s). I have a tattoo of a star on my arm, which I am looking to get touched up. Some of the lines are a bit shaky so I’d love to get them straightened and to have the whole tattoo look sharper. I also want to add some shading to the inside of the star. Would this be something tattoo artist would be happy doing and could they get it looking great? I live in London so there isn’t a lack of tattoo shops around me. I just need to find one that is credible and are also open Sundays (I work a lot). The shop I had in mind was Black Garden Tattoo (www.blackgardentattoo.com). Does this shop look good? Would I also need to ask for a specific artist in the shop? Or as it’s not a complex job, would any of the artists be able to do it? I don’t feel comfortable going back to the original shop that did it. Sorry again if this is a bit of a stupid question. I’ve had bad experiences with tattoos in the past and not getting the best outcome, so I’m really worried that it will be a repeat of that. I really appreciate any help at all.