HI Pradnya, Trailhead https://trailhead.salesforce.com/en/credentials/platformdeveloperi is the best place to start.
Topics to study are listed in this trailmix https://trailhead.salesforce.com/pt-BR/users/strailhead/trailmixes/prepare-for-your-salesforce-platform-developer-i-credential
If this information helps, please mark the answer as best. Thank you
Trailhead https://trailhead.salesforce.com/en/credentials/platformdeveloperi is the best place to start.
Topics to study are listed in this trailmix
https://trailhead.salesforce.com/pt-BR/users/strailhead/trailmixes/prepare-for-your-salesforce-platform-developer-i-credential
If this information helps, please mark the answer as best. Thank you