Yeah, you really don’t want to mess around with fingers with a non experienced professional.
If that is 100% what you want to do, make sure you find somebody that is fully competent.
Also being a guinea pig is not the best option, but you may need to travel a little further afield to find somebody with that experience 
I could probably link you to an installer or 2 in Europe, and maybe 1 in the USA, just from current community members with finger implants.
There may be more, but those are the only ones I can think of.
Fingers are a great option from a usability point of view, but there are others to consider also.
The below also links to position naming conventions we tend to use