Are the 30 days of demo over?
If Ps is too expensive, look for Photoshop Elements instead.
If you are doing Photography, Lightroom is excellent too.
If you are a student, there are education rates, too...
From my experience, Elements is too frustrating! Cannot recommend it, even at the price it is. If you want it, get the free trial and thoroughly try every single feature you think you will use, and make sure it works for you before you buy it.