I've been doing the same for the last few years on a 15 acre Ancient Semi Natural Woodland. I very quickly realised that I cannot identify and record every species, especially fungi and the invertebrates, so I concentrate on trying to just identify and record the more obvious and learn a new one or two each time I visit (I'm lucky, the wood is only 500m from the house).
I have a management plan that is slowly being implemented. However, every action has a reaction that may not be desirable or forecast, so tread very carefully with any changes you make. The dark, damp, corners that hold mosses, liverworts, and all manner of invertebrate species, need our protection as much as the bright butterflies and flowers. What I'm saying is be careful not to throw out the baby with the bath water
I see you are in the West Midlands, if you are ever over here (near Welshpool) you are welcome to come and see what we are doing.