Beginners guide to meditating?

Hello! I must admit this is not something I've ever done before so wonder if anyone has any hints, tips or basic instructions etc please? It's a concept that feels slightly alien to me at the moment but feel it's time it may be needed.

Also, are there any forms meditation that can be done alone or in private (as at the moment it would be easier do in private than explain a whole host of things)?

:)