Etienne, welcome and congratulations on your first shave!

I'll let others answer the questions on honing the strop.

Some do shave with only one hand and if it works well for you, then hey...keep at it.

However, I and I think many others, believe its a good idea to learn to use both hands. It gives you added flexability and options. It takes a little getting used to, but in the grand scheme of straight shaving, it doesn't take very long at all. Just go slow and be patient. Enjoy!

Jordan