The generic answer is that the CAA publish the light aircraft maintenance program as CAP 411 and this is a good place to start, it will tell you what must be done but not how to do it.
CAP 411: Light A/C Maint Schedules (Aeroplanes) | Publications | CAA
In terms of paperwork you will require to have the aircraft & engine mantenance manuals as well as access to the the applicable SB,s. The aircraft MM usualy has the checks that the maker requires to be done.
Tooling will depend on the type to be maintaned but a good mechanics toolbox is a place to start but it is likely that some type dedicated tooling will be required.
The 50 reqires some parts to be changed so expect to have to buy filters, oil seals, gaskets, oil, grease, locking wire, brake pads & the like.
My advice is to pay an LAA inspector to show you how to do the check before you attempt it yourself, the LAA also run trainning courses from time to time that might be usefull, at the end of the day a little trainning is likely to keep you safe and save you money in the long run.