can anybody give me some advice on playing rogue?

Hi!! I've been wanting to learn Rogue for a while now i think i finally wanna go for it :) i have a few questions that hopefully some of u can help me with! sorry in advance for the long post 🙏

1. can anybody give me some advice on what characters she does & doesn't play well into?

2. does she have any hard-counters that make it impossible to play her? so i know when to swap off xD

3. are u always using some type of combos, or do you sometimes just button-mash and use skills randomly as well? i find myself doing the latter a lot and idk if its good or bad...

4. lastly, is there's anything i should be playing extra attention when playing rogue as opposed to other tanks (i mainly play shield tank)

right now i'm watching cringe alarm's rogue guide to learn her combos, if somebody could recommend me other videos and guides to watch i'd be grateful!!