It is quite normal for beginners like you to get confused after reading a tonne of UPSC Articles from different sources. But I assure you that after reading this blog, it will clear all your doubts

For Prelims, there are majorly 8 topics you need tp cover extensively.

1. History

For history all you need to do is go through sleep IAS notes. They are really good. Forget spectrum and old NCERTs

2. Polity

As in the past, Laksmikant addreses all concerns related to polity section of Prelims

3. Economy

Go through Class 11 and Class 12 NCERTs and then cover budget and economic survey of only one year extensively.

4. Environment

For this go through Rushikesh sir notes. You can get it on Telegram.

5. Geography

Cover only Class 11 and Class 12 NCERTs and go through PYQs

6. Science and Tech

Cover this section from current affairs and PYQs only. This is very scoring.

7. Current Affairs

Forget Vision IAS, refer Sunya IAS current affairs notes for Prelims exam. They are really good.

8. PYQs

At last you need to cover the PYQs of last 15 years as extensively as possible

Conclusion

Apart from this, there is no need to study any other source or listen to anyone. Just do these religiously.