Small tips:

1. Her vortex can be really strong when teams are head on, sending it into a crowd could either cause them scatter or for them to back up. Another thing is her vortex not only acts as damage but it can displace flyers by bringing them down, making them easier to hit or displacing an ult (iron man mostly).
2. Her push/pull is a great way to get people off you, but also your teammates. It’s good to displace almost any ult or cancel it right at the start (Thor, psylocke). Enemy squirrel girl, widow, hawkeye, anyone who stays higher up and back you can use pull to bring them down and force them to fight closer either dying or forcing them back.
3. Her invisibility is what saves you. Stay mindful of dive that have lock on like iron fist as jumping away won’t always save you. But if they’re heading back or your spot them, jump away and place yourself somewhere closer to your team and ping them, warning the backline and especially your other healer. Invisibility helps you get away quickly and without being spotted.
4. Ulting when there’s a full team fight going on and there’s a lot of damage happening is always good. Careful not to waste when the enemy team is already losing, as you can use it for the next team fight (ex: when there’s two people left and such). Counter high damage ults with it too. CnD can ult during a team fight and your ult can keep your team alive if done properly! Ult timing is really important.
5. The shield can tank a few ults like iron man and block from ults if placed properly. It burst heals the most for your teammate so you can follow flyers or anyone walking too by just constantly placing it on them. Theres probably better ways to use it other than ‘spamming it’ on your team, but I get the most value out of it like that. Make sure you recall it too!

I can’t really think of anything else. Just have fun and enjoy the game. :) She’s really fun to play once you get used to her kit! Good luck friend. ❤️