So am thinking about getting 2 tattoos next year, one of which I know exactly what I want and the other which I know the basic idea but I need designing. Does anyone have any recommendations about how I get this done, am I best going to the artist who will do the actual tattoo or asking someone else to design it.
The first part is the below which I want on my lower back but am not sure of the size or exact placement.

Above that and across/between my shoulder blades I want an eagle in a celtic style, which i need designing, but again am not fully sure on size.
The first is a celtic tree of life, and both represent rejuvination and renewal. Have been through a lot mentally with depression and anxiety and I want to beat this as well as getting fit and healthy and this will be my marker/reward/reminder of doing so once I beat it, although a friend has told me not to do so until I am sure I have.
I am basically fishing for advice on making these decisions from people who already have tattoos, or opinions on the design from anyone really.
Another question is that I am planning on building/sculpting my shoulder muscles once I have lost more weight, I'm thinking I am better waiting until then to get the eagle done at least, as otherwise wouldn't it be misshapen afterwards?
Also what experience have other people had of family or friend approval/disapproval, i know its my own body but i know a few will not approve.
Just trying to gather my thoughts as its a pretty big and permanent decision!!!
Sorry for the rambling scatter gun nature of the post!