I agree that u should def take time building up your confidence, don't do something you don't feel comfortable with, as this could make your horse feel more insecure and that is when accidents are most likely to occur. so deffinately start with trotting poles and remember you can walk over them to begin with! having lessons should also help, because knowing that another person is there to help and guid you offers great peace of mind. when you do build up your confidence and can pop over small jumps at canter (if thats in a day or a year it doesn't matter!) remember that the jump is just a canter stride that has been extended upwards, or if you like, canter is just many very small jumps

it helps alot if you can ride a calm and easy horse who is very unlikely to do anything silly as this will be one thing less for you to worry about. if you do get lessons you can always ask to be lunged over poles and then jumps first. don't be afraid to ask for whatever will help your confidence grow, and I'm sure that soon you'll find yourself flying!
xXx