We've bought an old farmhouse in NW France and want to turn the 3 hectares (about 8 acres) of fields into a forest for wildlife. I'm finding it hard to get land management information is that isn't agroindustrial farming or large managed single species woodlands.

Is there a good guide to the basics of planning, planting and supporting a mixed wood forest on a small scale?

And even basic land stuff, eg as the autumn storms have hit we've seen one part of the fields get very wet and waterlogged and we were considering trying to cut some swales or create natural streams that could coordinate the water better and support biodiversity. But everything I find online is for managing fields for intensive crop growing. Is there any good keywords to throw in? "natural"? "permaculture"? Something?

Thanks! And sorry if this is a stupid question, but I don't know where to start!