As its a nice flat surface spread the adhesive onto the wall with a notched trowel then just apply the tiles with firm but steady pressure and use spacers i normally get a 2x1 batten and tack it to the wall 1 tile and 2 spacing a high from the work top then tile from that upwards when dry remove the batten and tile down to the worktop then grout but leave the last tile space to allow sealant in.
Tiling onto plasterboard youtube.
Tile onto p b dont skimm it bring weight issues into tile fixing.
You should not tile over wallpaper glossy surfaces lead paint or plywood.
Tiling onto plasterboard walls.
If you re not sure if you have lead paint test kits are available.
It should be a minimum 12 5mm thick when fixed to timber framing or battening and fixed in accordance with the manufacturers recommendations.
If you know how to tile you can make your renovation project a lot more affordable.
Preparation for tiling onto plasterboard plasterboard should be dry securely fixed and rigid with no protruding fixings with the face to receive decorative finishes exposed.
Any windows tile from centre of these.
As for setting out centre your walls and walk tiles into corners to see what size of cuts you will have.
You may tile over existing tile painted or unpainted drywall plaster and textured walls.
However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight.
What size of tiles are you fixing to walls.