Hi Suzanne and welcome to TFF!
Fishless cycling does seem a little tricky to understand at first but the -doing- of it is quite easy and we consider it a fun activity in the sense that you can interact with the other members and be learning all sorts of new things and working on a plan of what fish to put in your tank during the fishless cycling time.
Start with these first actions to get ready. Start looking for a good liquid-reagent test kit to be used to measure ammonia, nitrite(NO2), pH and nitrate(NO3). Many of us like and use the API Freshwater Master Test Kit or the Nutrafin Mini-master Test Kit. There are others too. The important thing is that it be liquid based rather than paper strips.
Here in your thread, try to describe the exact make and model of your filter to the members and exactly what sponges, ceramics or other "media" (filtering materials) are in it. Its important that they rule out there being any chemical media that might, for instance, remove ammonia before the beneficial bacteria can get it. Sometimes filters come with "Zeolite" that does this.
Begin looking for a simple household ammonia to use to feed and grow the bacteria. The members can help with this, depending on where you are in the world. It is usually found in the mop&broom section of stores. It needs to be clear, without dyes, fragrances, soaps or surfactants (all of which are commonly added, making it sometimes tricky to find the right thing.) When you shake it you want it not to foam for the bubbles to go away in 2 or 3 seconds kind of like water. Some members say its better to think of finding the right ammonia as kind of an adventure and like to here others reports of this. Beware of believing store clerks.. sometimes you have to hunt on your own!
So a good test kit, the right ammonia and the right media in your filter are good things to get yourself ready. Then perhaps another read through of the information! The important articles within the Beginners Resource Center are the ones on the Nitrogen Cycle, the Fishless Cycle, Aquarium Setup and the Fish-In Cycling Situation. Lots of people say they have to read some of these several times because they contain such strange sounding stuff when you are just beginning!
The main problem is that the "filter" they sell you for your aquarium is really just a "hardware kit" and you need this "cycling" knowledge to know how to "set it up" and get it ready. It can take anywhere from 3 weeks to 2 months before its ready to handle fish! The first time I read about it I thought it was really bizarre to think that what people were doing was growing two specific species of -bacteria- (!!) inside the filter of their tank! Like many, I just thought the filter was there to catch little particles of dirt! Instead it (the filter) turns out to be this all purpose tool to not only catch the particals (called mechanical filtration,) but also to hold special substances sometimes that do "chemical filtration" (on an optional basis,) and most importantly to do this crazy thing of harboring all these bacteria that "eat" the poisons that quickly appear in any tank (the whole bacteria thing is called "biofiltration" and the thing we're creating is called a "biofilter.")
Anyway I hope this helps as a post for you to look back at now and then. Its better to just ask questions one by one as you go along. I like to consider all these steps to set up a tank as a big part of the fun of having a tank in the first place. They are quite fascinating and core to the hobby and the whole hobby is so good for "quieting down" and taking time to think about and enjoy things!
~~waterdrop~~