Worrying until you are sick at your stomach and thinking about covering up an unfinished cover-up is not normal or healthy,. That level of anxiety is very worrying, and it suggests to me there is an issue. This person says they have other tattoos, but it might be one tiny one somewhere. It doesn't mean they are equipped to handle an enormous tattoo on their arm. Any attempt to cover that up again will drive this person around the twist because it will not look better.
So thanks for sharing your thoughts, but I stand by my comment.
I did a quick search and found only a no-info website page and almost no input facebook page. The Owner's name isn't even prominent or possibly even listed, so I can't really react to historical reference artwork or ability. Not comforting here from the outside.
The example you posted could be understandable to the closely initiated, but it's too small to provide any real detail. Hopefully you're going much bigger if you're intending to add a tree or two to the mix.
The results, feel and comfort gained (or not) from your consultation is going to be paramount.