With the right horse, the right rider, and the right trainer, getting your 1st & 2nd level scores next year is absolutely doable.
The caveat: the gap between first and second level can feel like an impassable chasm in some circumstances. If second level is new to you, and new to your horse, it can be quite a learning curve. What is doable is really contingent on you, your horse, and the training.
One thing to keep in mind is that it can be difficult for a rider who doesn’t know second level movements, to learn second level movements, on a horse who is also just being trained on those movements. It’s a bit like the blind leading the blind. What a horse may learn/understand with a trainer may not always be carried over to what they understand with an owner/rider who is as green to the movements as they are. (And as someone who found themselves in this situation once upon a time, I can say that one of the things I really benefitted from was being able to lesson on my trainer’s schoolmaster: I could understand the aids and the mechanics in a hands-on way which I could then carry over to helping my horse understand what was being asked of him.)
Don’t lock yourself into a timeline. You cannot fake the strength necessary for collection and mediums. Take your time, don’t rush things, do things right, and if the strength, knowledge, and aptitude is all there, things will fall into place. A trainer working with you and your horse can probably give you the most accurate picture of what is feasible for you as a team, since so much of it is horse/rider specific.