Adding to what @reconzero said, when I play solo I play loba. She can move quite a bit instantly. Another fast mover is octane.
dropping hot has its benefits and its draw backs.
when I am with a team and we drop hot, we usually always each get a kill. The mental state is very different from when we drop cold and are focused on scavenging. In those cases we may suddenly be engaged and I personally am not mentally ready because I wasn’t expecting it like I do when I drop hot.
so sometimes I want to drop hot because I’m in the mindset to engage asap, and sometimes I want to put off first engagement because I’m tired.
as for best time to play as others bring up, I look for the best time to match with randoms who tend to work as a team rather then do their own thing. It has come to my attention that those who literally move as a team are FAR more likely to win engagements than those who are trying to catch up to their teammates who think they are so good they can be 30 seconds ahead of their team.
don’t be under any illusion. This is a team game.