i've no experience with this, but i'll have a go
i'd take the glows out, rocker cover off and turn it over by hand to get rid/check for water.
If happy, then drain engine, all boxes and tank. loosen injectors and pump em. wd-40 the **** out of everything in the engine bay including all leccies. Dry leccy plugs off when waiting for the oil to go.
Then i'd just replace oils, filters and try to start it expecting to replace the oils again soon if they need it.
If it goes, then drain the cooling system and flush the rad and heater matrix out, also the heater box. Then go around cleaning up/silicon grease leccies/fuses and copper grease the usual.
Also hubs and stuff.