Yes! ofcourse you can start your preparation during 10 class.
During 10th studies focus on the science NCERT and maths NCERT!
Read both the NCERT book thoroughly, in the maths i will suggest u to focus more b’coz when u come to class 11-12th u need maths soo badly for solving physics and physical chemestry!
Dont go all extravagant for your preparation.
Dont use any extra material just go for NCERT during 10th standard!
During 11th and 12th focus on BIOLOGY NCERT completely and.
For inorganic and organic chemestry u again use NCERT only.
For physical chemestry and physics in 11-12 thire you need some extra material.
For physical chemistry buy the class notes of ALLEN leader class and read them along with NCERT!