hi,

see chemistry part of 11th standard has three domains.

1. physical chemistry

2. organic chemistry

3. inorganic chemistry

you will find some of familiarity with physics in physical chemistry. you can start chemistry lessons from organic chemistry as well. since organic chemistry portions is considered tougher , you have study sincerely and have to provide ample amount of time taking notes and short notes. ncert books are best text books to start with.

hope you understand.