help with macro photography (accesories & techniques))

[lautis11]

hi, my name is lautaro, i'm from argentina and the first time that i used a camera was the same time that i learned to walk by my own
recently i had the luck of receive a panasonic lumix fz100 as a gift, and i'm geting preety good shots! but i have some questions about macro photography (other kinds of photography too, but tis is not the indicate forum ) one question is how to get the right distance for a good focus shot, because it's hard to focus with zoom. my cam has: telefoto (tele) and gran angular (wide angle) convertion lens mode. can i use one of those to get better shots?
another thing is the manual focus... i cant understand it completely (the configuration), can someone explain some technique to configure it for macro photography (example: how much zoom, how much focus distance, how much focus aperture, etc.)
my final question (and i think the most interestin at least for me ) is about convertion lenses, macro filters, color and polarized filters. can you tell me please, some good options to buy, that fits my lumix, and that i can use for macro photography? one point to keep in mind, is that i buyed the camera recently, and i buyed several accesories for my rc plane 2 day ago, and i'm a little short of ca$h, so i'd like cheap (but good quality) accesories, if i get good shots, maybe y spend more money in good equipment.
since now, thanks!
lautaro.