Knowing your porcelain tiles from your ceramic tiles can make all the difference to how they are installed, how long they will last and their safe preservation! If you want to know how to put - and keep - the smiles on your tiles, then you need to do your research.
Better still, it would be well worth your while to spend a few hours on a weekend tiling course to really get to find out 'how its done' by the experts. It will save you money, time and possibly your sanity, by getting the essential 'know-how' and skills training.
You never know, you might decide you are really good at it and want to go on and learn more, maybe make a whole new lucrative career path - the decision is yours!