Just learn to really fly the Lt-25. If you really practice moving to a second plane will present little to no problems for you.
biggest thing I've seen here and at the field is that as soon as someone learns how to fly the pattern and land so so the trainer gets put away and out comes the low wing sport plane. BTW Most experience guys can tell that you followed the afore mentioned trainer program after watching you fly just once

So my advice take your time and learn there really isn't any rush that isn't 100% self imposed