My first advice: walk barefoot or with "barefoot" shoes

Before any running trial with five fingers or any other minimalist shoes walk with them during 3 months and walk barefoot at home!

Then run barefoot on the wet sand at the beach no more than once a week for instance.

If you experience no pain especially at the balls level or in your Achilles' tendon you can begin to alternate minimalist running shoes and cushioned ones to run your workouts.

Avoid road or concrete surfaces with minimalist shoes!