SERIOUS HELP NEEDED!!! 10 -> 11 (17F ki help karte ho,17M ki bhi kabhi kar do)

Guys so Im moving from Class 10 to Class 11 (PCB). Can you please give me advice on how to start the classes,which is the easiest and most difficult subject,tips and more? Also, Vidyapeeth by default kit deta hai kya? Kyunki udhar admission le li hai. Also give some good teachers for 11th and mistakes to avoid (bhai pehle galti se "toppers" likha tha,I'm sorry)