How do I get more Spanish lessons to practice? I finished all of the lessons and I want to continue increasing my proficiency.
There are a few suggestions here - https://www.duolingo.com/comment/24632807
I'd suggest childrens books for reading practice, there are a few at http://www.childrensbooksforever.com/index.html or check your local library (see https://www.duolingo.com/comment/24720064 for other ideas on this).
For listening practice there are many videos on youtube (like easy Spanish, or childrens tv shows in Spanish, like Pocoyo) and also lyrics training https://lyricstraining.com/es/
Do the reverse tree (makes you type into L2 target language Spanish).
Have you already had a look on Mondly: https://www.duolingo.com/comment/23524002/Mondly-languages-added-19-new-topics-to-their-tree