If you're a tourist who never learnt how to manage your gearbox and use an automatic, it doesn't have any impact on danger (both for yourself and other road use

If you're a tourist who never learnt how to manage your gearbox and use an automatic, it doesn't have any impact on danger (both for yourself and other road users), at least the first days, until you learn. The issue with automatic is that you'll never have the opportunity to truly improve.