I am currently downloading lightroom to trial, but the instructions tell me to also download photoshop cc afterwards. I believe the price for photoshop is twice as much after the free trial. Do I have to trial both or can I just trial lightroom?
You can definitely can try Lightroom CC alone till it expires.
Simply download and install it. Digital photography software | Download free Adobe Photoshop Lightroom CC trial
Links might be helpful:-
As mentioned above you can just trial Lightroom....
However pricing depends on your location so check out through Adobe.com on your computer as it will localise.
Usually the best option is Lightroom plus Photoshop which is the Photographers Package.