No one can give you this type of instruction over the Internet, and a green rider trying to teach a horse a skill that the rider is not confirmed in usually does not end well.
Howèver, I am sympathetic to your dilemma about not having easy access to a trainer. Here's my suggestion - find a local riding school and take jumping lessons on a schoolhorse. Once you're really solid in your two point, and can navigate a 2' 6" course successfully, ask to be put on different and greener horses. Also ask the instructor about the rational for the exercises, eg, why cabaret or placement rails are used, why gymnastics are used, how do you seat them for your horse, what skills a horse needs to have mastered on the flat before beginning jumping, what constitutes a good distance and good jumping form, what a standard progression of exercises for a green horse would be, etc.
Also ask if you can watch other lessons, you'll pick up a lot watching other riders. Even better would be to be in the middle of the ring with the instructor so you discuss what you see. Watching experienced riders school greenies would be great too.
You're also going to want to get comfortable jumping single fences of at least 3'3" before you start jumping your horse - green horses often over jump and make a big, round effort over a new fence. You want to make sure your capable of staying with that - if the horse jumps you out of the tack, you get left or catch the horse in the mouth, you're creating more problems, not training.