It is generally not possible to directly join another university like Delhi University (DU) and start from the 1st semester after completing one year of a BA program in a different state university.

Universities typically have limited flexibility for credit transfer between institutions. Even within the same university system, transferring a full year's worth of credits might be difficult. Course structures and curriculum might differ between universities. Your completed first year at the state university might not perfectly align with DU's BA program requirements.

If both your state university and DU are affiliated to the same university grant commission (UGC) recognized university system, you might be able to explore an affiliation transfer process. This would allow you to continue your BA program under the new university (DU) but might still involve some credit evaluation and course adjustments.

Some universities allow students to apply for admission to a higher semester (like 2nd or 3rd) based on their previous academic performance and credit evaluation.  Explore DU's admission process to see if they offer such a program transfer option for students coming from other universities.

If the above options aren't feasible, you could consider starting a fresh BA program at DU. This would involve applying for admission again and potentially losing the credits you earned in your first year at the state university.

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I hope it helps!