How should I start CSE aiml from 1st year?

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Starting BTech CSE AIML this year from a tier 3 clg I'm a 2nd dropper I know you might think 2nd drop ke baad bhi tier 3 clg 😭 but I just wanna make the best out of it now

My main goal is to get a good placement

How should I start preparing from 1st year?

What should I focus on first?

Should I start with C++ or Python?

Any mistakes I should avoid?

Would really appreciate some honest advice from seniors 🙏