It will take a very long time. These were composers who played the piano from a very young age and were among the greatest technicians at their instruments in their respective eras. Their works explore what is possible on the piano, surpassing much of the two centuries worth of music that preceded them in terms of both difficulty and expression (which is a difficulty in itself).
I'm an adult beginner, as well. There are things you want to play, but then there are things you should play. You should get a teacher if you can find the time--it is good to be able to ask questions, to be able to be corrected. You should also get books to get the proper fingerings of scales, chords, and arpeggios, and play them with both hands until they're as easy as breathing. You should get books filled with easy works and slowly work your way through them. Then you should pick up Mozart's works and learn them (and study them, if you also intend to compose). After familiarizing yourself with Mozart, who exposes you to all kinds of keyboard figurations (in what is now considered to be a limited way, thanks to centuries of advances in keyboard manufacturing and pedagogy), pick up Bach, who often requires your left hand to be as good as your right, and who offers some truly complex music for your mind and fingers. Then try your hand at some of the intermediate Chopin and Beethoven. Try to learn Chopin Op. 10 no. 3, and, if you succeed, maybe move on to Op. 10 no. 12.
In order to play the Chopin Etudes you need to have a full grasp of all of the techniques covered by the Etudes. This takes a long time, especially for an adult beginner. Think of the Etudes not as much as "studies" but as graduation pieces after years of study, a confirmation of years of hard work and dedication. It's a good goal to have, but there's so much great music to be found that isn't so demanding. You should focus on these for the time being, maybe being aware, at a background level, of the skills required of these monuments of piano writing.