Well, as far as jumpin is concerned you need to be careful with your shoulder and all. If you've never jumped before I'd recommend a basic jump cue with a phenolic tip, tip/ferrule combos are ok too. The brand doesn't matter so much, J&J or Bunjee or something similar will do just fine for about 60-100 dollars. I'd steer clear of ultra light ones or ones with 3-4 parts etc. Cues around 7.5-9 ounces will jump easy, with control, at the minimum effort. That is important, because you certainly don't want to strain your shoulder. Later, if you decide to try to jump over full balls a chalks width away, you can invest in some ultra light carbon nonsense, but for most jumps, those cues tend to actually make it harder to have control of the power etc.. You don't want to strain any part of your body or work hard on stroking fast. Just a nice smooth stroke will do wonders with the type of cue I recommended. If the cue is significantly lighter, you'll need to stroke it faster, which makes your shot more strained and less controlled, however you can then jump closer. My advice is to learn the easy jumps well. The extreme shots are low percentage, anyway.
Start with jumping with a rather shallow angle on your jump cue, and jump only half a ball in the beginning and just let the cue do the work. Getting over a ball will happen almost immidiately. Unfortunately people then move on to extreme and silly shots, without actual mastery and control over the easy shots, and they never full learn the shots that they actually will need to shoot. If you can avoid that temptation, take it slow, in steps with mastery of each before moving to the next, you'll be better than 80-90% of players very, very quickly. Notice where the cue ball lands, and try to land in the same spot on every shot when you set up your training shots. Slowly, and in a controlled way, try to change the landing area, and stay in the the new landing area, etc.. This is probably THE most important thing to learn, because landing in the correct spot is probably 80-90% of the recipe for successful jumps. Without mastery of this, you'll never be consistent. Also, if you learn to land on the ball from any position (of short to medium length), consistently, then you can make shots that probably less than 5% of the pool playing population can make and you never have to actually set up silly shots to learn how to do it.
Shallow angle gives more speed and less height to the cue ball. Speed and low elevation is your friend for long shots. Because of the extreme elevation, unwanted masses happen very easily. Do not over-elevate! Try to elevate as little as possible. For short shots (which you should wait a bit before you try) you need more angle and less speed. As you get better at this, you can put draw on the ball. Then sidespin. Follow is the most difficult (on short shots especially) and should be learned last.