Which ITH design projects are you considering? It depends on which one as there are many different methods for ITH projects.
Flip and fold projects give you the stitch line, tack down and final stitch so I would try to find one that works for your specific project. You would have to know which steps to add or delete for other designs.
Do you have software to make changes to designs?
Designs for applique are generally done ITH, no separate template needed usually.
You can make flip and fold right projects on the sewing machine too. Good luck!