If you don't know how to make a spell work then you need to start from the bottom up: meditation, grounding, centering, visualization are just a few good things to work on first.
Secondly spells are not the only way to make a change, there are many techniques that do not require words. Also side effects stated on spells found on this site are usually nonsense, side effects usually only occur if you do not know what you are doing: where the spell may "bounce" back, or you haven't gathered enough energy to complete the cast and are drained.
I am already good with visualization and thanks for the help..and I would never use any spells from here..i prefer to make my own. and I make it very good at visualization, I can visualization of my home and remember it when I am at other places.