Do you think it is possible to go from jumping 2’3” (starting 2’6”) to jumping 3ft (minimum) by end of this year?

If you practice regularly then you can probably do it. You have to be very confident as you move up, if you are nervous it may slow you down. You should also make sure your horse is able to jump that height comfortably. It would be easiest to learn on a horse that won’t be refusing, misbehaving, and you know can already do it. Good luck! Hope this helps!
It definitely depends on how fast you learn as a rider, if you’re a fast learner and can ride the courses correctly I think you’ll have no problem. If you take more time to learn probably not
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