Well, you need to be careful with new Sombra to not stay too long is stealth.
I still hold myself on the 6s from before the changes only rarely I wait longer for a Zen to shoot out his charged shot (or similar situations) to engage.
Then you will need to learn the timing of TL to dodge mass dmg (dva bomb, Doom ult, etc.) your shortly invincible when using TL so you can use that. You will learn it by trying and failing or atleast so did I xD.
But with the reports and flaming you probably will need to live She is still a bad hero even if the meta favors her.
Tilling teammates will always flame the Sombra if you played well or not I learned that the hard way xD.
I mean I hade multiple people telling me to kill myself before we even where out of the Spawn just because I played Sombra…
And if you’re a meta player I suggest learning something else She is not worth the effort you need to put in to learn her. Play her if you love her playing her and her Playstyle.
Well, the only thing you can really learn without just playing is how her Hack works: All Heros which Passives are Hackable
Or maybe her bugs and what you need to be careful of: Even more Sombra Bugs in 1.26/1.27/1.28 [With Video's]