If you don't know how far away you have to be from the bomb, look at your mini-map while running/making noise... Once the bomb symbol is outside your circle you are far enough away from the bomb explosion.

I use Valorant DM as practice for competitive. As many here have recommended, I start rounds with the Sheriff/Ghost to practice with headshots, then practice using the Phantom/Vandal at longer ranges, and generally take on as many fights as...