get some sealable bags some labels a note pad and something to take pictures with
take a picture of everything you take of put things into labelled bags and make notes of how they went together etc and what order things where in e.g washers nuts bolts etc
take yore time
anything youre unsure of ask on here about no matter how stupid you might think it sounds
oh and dont try to force anything too much
This is top advice.....
When ever stripping an engine which is to be rebuilt, even I put the nuts, bolts and other items into plastic bags.... It makes rebuilding things a lot easier, nothing worse than having to empty a tin/box of nuts and bolts on the work bench to look for that last illusive timing cover bolt.
Other than that, take it apart in which ever order you like, only things which will need special attention are the head nuts which need to be undone ( and done up ) in a specific order, and if you're not changing the cam followers, make sure you number the push rods
