I think you mean that you have signed up for that tournament.
I see online that it is a 3 day rapid Chess tournament and the games have a 30/30 time control.
https://aicf.in/wp-content/uploads/2025/06/4th-Uinsports-B-1700-25th-to-27th-Jul-2025.pdf
There are no special tips or openings that will help you.
Just play solid chess and take your time. Learning to use your time is something you can practice.
I would change your usernames since I suspect it is your real name and people will take advantage of the time between rounds to look at your games.
I had recently taken part in 4th UIN Sports FIDE tournament this is my 1st fide rated tournament I'm about chess.com rated 1450 and in another id 1700 ( removed).
The tournament is on 25th July but I had seen that there are around more than 150+ rated players with a range of 1400 - 1700 fide elo . What do you think how can I improve myself and give myself even a chance to stand against them or beat them any specific gambits , opening or tricks or some advices ?