I've never hunted w a child like that. How great would it be to try. And if successful? It'd be perfect.
So here's how I'd personally attack this. Yes a spring turkey hunt would be perfect. I don't know you so forgive me for this but as long as you can show her a good hunt. I'd roost a bird the night before. If you don't roost a bird make sure you know where some are going to be relatively early in day.
Don't make this a marathon session. When she's done your done.
To be honest if you're worried about it make sure a bird roosts least she would be close her first sit.
For shooting practice start her with a .22. Let her get familiar. Inner foam hearing protectors as well as muffs. The less noise less it seems to kick.
Once you go to a shotgun shoot sparingly at first. Use something like a lead sled to take the recoil away. Don't tell her you're doing that. It's just a rest. Don't overdo the shooting here. She's inexperienced. Give her time.
YOU pattern her gun, away from her eyes. She doesn't need to see the pounding turkey loads can put out. Perhaps if you think the shot will be close a pheasant load might work. Know effective range of the load. She shoots reduced loads at paper than come hunting you give her the proper loads. A red dot might be easiet for her. A scope could hit her, teaching her to line sights is sometimes tough at first. A bead if used you need to make sure the gun throws a straight pattern and her head stays down. Practice different shoot positions. Tell her how to act/react. Prepare her for all situations.
Guns now have advantages/disadvantages. A semi often kicks less, it's a little more dangerous as it self loads a new round. You need to control any potential safety issues. A pump or single shot is lighter but may kick more. If it's an older gun the stock prob drops too much and will kick more. The gun should fit her. Needs to be youth gun. All these considerations. Another, stay away from hammer guns if possible. Cold wet inexperienced fingers won't have the dexterity your a do.
I've never helped a child like this but have mentored many kids through NWTF, and privately. If I can help w anything pm me. If you can pull this off safely God bless you for trying.