I’ve run a road marathon and want to try an ultramarathon – where do I start?

Is a 50K ultramarathon harder than a marathon?

I want to run 100km or 100 miles but the distance is overwhelming –how do I tackle it?

I’ve entered an ultra – what do I do about training, kit, nutrition, logistics, cut-offs, aid stations, hydration, terrain, ascent…?

How long should my longest run be for an ultramarathon?

I’m not an elite runner. Do I deserve a running coach?