Hi mate, fresh out of PTS I bet you only have a 6mm and 10mm trowel. First of all if you are doing mosaics, get a smaller notch trowel! Second, TAKE YOUR TIME. Third use you grout float to press tiles into your adhesive (assuming they are on a sheet - what size mosaic?). Would use BAL White Star myself for addy though they do Mosaic-fix specially for this type of job, and BAL Microflex grout for kitchens.
Try to avoid small cuts around the edges if possible and only use the wet cutter where you can't avoid it - tiles come loose from the sheets!
CLEAN AS YOU GO ALONG!!!!!!!!!!!!!!!!!!!
Good luck, let us know how you get on.
Grumpy