There are several online communities and groups where you can connect with experienced PSIR (Political Science and International Relations) aspirants and seek advice on study materials. These platforms provide a supportive and interactive environment where you can learn from others who have gone through or are going through the same journey as you. Here are some popular options:

1. EduRev: EduRev is an online learning platform that offers a dedicated section for UPSC preparation, including PSIR. It has a community feature where you can connect with other aspirants, ask questions, and get advice on study materials. It also provides access to study notes, previous years' question papers, and mock tests specifically tailored for PSIR.

2. UPSC Forum on Quora: Quora is a popular question-and-answer platform where you can find a dedicated UPSC forum. Here, you can post your queries related to PSIR and connect with experienced aspirants who can provide guidance on study materials and preparation strategies. It's important to note that while there are many knowledgeable individuals on Quora, it's always advisable to verify the information by cross-referencing with other sources.

3. Telegram Groups: Telegram is a messaging app that hosts numerous UPSC preparation groups, including those focused on PSIR. These groups bring together aspirants from different backgrounds and provide a platform for discussion, sharing of study materials, and seeking advice. Some popular PSIR-focused Telegram groups include UPSC PSIR Discussion Group and PSIR Optional Preparation Group.

4. Online Forums: There are various online forums dedicated to UPSC preparation where you can connect with experienced PSIR aspirants. Websites like iasbaba.com, forumias.com, and insightsias.com have dedicated sections for PSIR where you can interact with fellow aspirants, seek guidance, and access study materials.

5. Social Media Groups: Platforms like Facebook and LinkedIn also have groups dedicated to UPSC preparation. These groups often have subgroups specifically for PSIR aspirants. By joining these groups, you can connect with experienced aspirants, participate in discussions, and get recommendations on study materials.

Remember to always double-check the information provided by other aspirants and consult reliable sources such as standard textbooks, coaching materials, and trusted websites. These online communities can be valuable resources, but it's crucial to verify the accuracy and reliability of the information shared.