Before you pay for anything all handbooks are available for free download from the FAA website:
https://www.faa.gov/regulations_poli...nuals/aviation
Several websites where you can take free practice tests:
https://www.4tests.com/private-pilot-exam
Then there’s 1000’s of aviation videos on YouTube if you need some help visualizing:
https://m.youtube.com/watch?v=YzNSBTxH_Cs