To the OP -
1) you don't need a billiard cue in the early going, but if you keep with the game you will eventually want one. Personally, I have a Hanbat, which is a high quality brand with a number of very reasonably priced models. You can find them in the kozoom store.
hanbat on kozoom Scroll down for the less fancy more reasonably priced cues. There are, of course, many other very fine brands, most of which are also sold on the kozoom site.
2) in my experience the biggest difficulty I, and other beginner/novices, have is 'finding' a shot. Watching some of the very many high level billiards videos on YouTube is a great resource. I like to pause before they shoot and try to predict the shot. It is this abstract nature of the game where you first have to figure out a shot before you can shoot it that sometimes frustrates pool players.
3) Learn the patterns and principles in Byrnes' books. The big ball, the 2-way shots, the naturals, the 5-rail pattern, short angle shots, tickys, etc. One you learn the basic patterns you'll spot those shots easier and learn how to adjust them as needed.
4) If possible, play with and learn from better players. And, if they are open to it, ask questions.
5) Have fun. Treasure the points you make and don't get frustrated by the ones you miss.