How do I learn to draw tattoos?

I don’t want to be a tattoo artist or apprentice, I just wanna know how tattoo artist design their tattoos. I really like how tattoos are drawn and the whole style of it. Is there any way to learn drawing tattoos without being an apprentice?

I am looking to get a tattoo shortly. I made the image myself but it is a VERY symmetrical design. It is important to me that when I get the tattoo done that CIRCLES look like CIRCLES… not ovals, etc.
Is this difficult for tattoo artists to accomplish?
Thanks in advance!

Can I use permanent tattoo ink with a airbrush or temporary tattoo pen? Will permanent ink last longer than the temporary ink?

I know that unless I use proper machine, it won’t be permanent.