Andhra University, Visakhapatnam

Hello Sai,
Getting Andhra University in 1st round is bit slim for you,however you may check here for more insights:
https://www.shiksha.com/b-tech/resources/ap-eamcet-college-predictor
Best wishes.

Definitely, you will get mechanical engineering seat in AU through the AUEET with 1002 rank.

https://www.google.com/amp/s/www.shiksha.com/university/Andhra-university-Visakhapatnam/exams/amp/aueet
This would help.

You will get admission in Andhra University for branches such as CSE (Computer Science and Engineering), IT (Information Technology), and E&TC (Electronics and Telecommunication ) with this rank in AUEET.

You can get EC, EE, Civil and Mechanical with this rank.

If you want to do your graduation from AU campus meritoriously, you have to get your rank below 2000. Your rank is very good for getting any branch in AU. You can take CSE or ECE whichever you want. But I would suggest you take admission in CSE as it has a lot of scope in future.
All the best.

According to your category (ST), your chances are there to get a good college.
Good luck.