Hi Sandy,
You join a small group of ladies who also love woodworking. Stick posted a link to a number of pdfs on router use and safety. They are well worth taking the time to read, maybe not all at once. What brand and model routers you have is an important bit of information because we have members who have probably owned the same machine and can answer questions with specificity.
Since you're new at this, I've attached a pdf of the 17 plus things that helped me accelerate my woodworking learning curve. It covers a period of 12 years and touches on many important issues, but don't expect to do what's in there all at once. Take your time, make stuff just for the fun of it. Learn as you go. The pdf is intended to help you make good choices, not waste money or repeat some of the dumb mistakes I made over the years.
Someone is almost certain to suggest you make your own router table. Lots of information on that on here and YouTube. A router table can be as simple as a sheet of plywood with a hole in it with the router mounted below. Table routing is FAR SAFER than using one freehand. You need a fence with a router table, and that can be just a piece of very straight 2x4 clamped to the edges of the plywood. You can even find a second hand table and cut the hole in that for the router. There's a picture of a home built table and fence below.
Bits are a whole different world. The shape of the bit varies according to what you want it to do. The most common is probably the roundover bits. It gives you a quarter of a circle shaped cut, like the edge of a quality table. Bet everyone here has a set of 3, for 1/4, 1/2 and 3/4 inch bits. Those are the ones you're likely to use right away to soften the sharp edges of a board. The picture is of a set of 3 that show the way the bit cuts their shape.
The direction you make cuts is something you have to pay close attention to. Stick's documents cover that and will clear up any confusion.
Bit height just means how far the bit sticks out from either the base (freehand), or above the table. You measure this with a very simple little tool, which I suggest you order to make your router life easier. Picture attached. It spans the opening and a small sliding measuring stick just touches the cutting edge of the bit telling you its height. Amazon has this one for $13
https://www.amazon.com/Trend-GAUGE-...gateway&sprefix=router+height,aps,204&sr=8-11
Most of us here are dads, and we try to take really good care of the lady members, kind of a protective thing for any dad with daughters. With that in mind, please go to a Lowes or Home Depot and buy the following:
--A dust mask (3M makes one with a valve to let exhale escape, but keeps sawdust from getting in.)
--Hearing protection (Earmuff style with 25 db noise suppression--Routers can be very noisy and can damage hearing.)
--Safety glasses (You can find one with bifocals if you need them.) If you need to wear glasses, search for goggle type eye protection that fits over your glasses-see pix. First time you get sawdust in your eye you'll know why this is important.
A lot of us here had someone in our lives who got us interested in woodworking. Was/is there someone like that for you? We always love to know such things.