No more smoke, advice on how to make tincture.

Im sick of smoking/dabbing. I have lung issues and I cant do it anymore. I have a few questions, what is the best way to make tincture (base material)? I have a gram of shatter and would like to use that to about an ounce of VG. is this a good idea? do you guys have any teks that you have tested yourself?

Any advice or pointers would be greatly appreciated. Im trying to use medicine while not having to eat it (or smoke) because I find without the ability to choose from tested strains (%thc) I often end up on the couch for a while lol.