How Long Before You Felt Capable with Mantis?

Like the title asks. I’m new to Rivals (started two weeks ago or so) and despite having Mantis in my top three most played characters AND higher proficiency than some characters I consider some of my mains, I feel like I’m not capable with her at all, but I have felt pretty decent and comfortable with other characters way faster. I think Mantis being a one star hero is so misleading, because I find characters with three or four star difficulties much easier. Mantis does have a bit of a learning curve/ability ceiling, and I currently play her more of a back line DPS/support, when I know she’s not the best in that way.

Also have been watching a lot of videos on Mantis players and it feels like they just kind of understood her from the start. One I watched was playing Mantis for 10 hours, and seeing how each hour went, and what they learned. But they seemed to already be pretty good with her from the start. So I was wondering, for Mantis mains, how long did it take for you to feel like you could play her well enough that you wouldn’t let the team down? Or that you could play her without dying a lot in game and actually have room to improve with more games? Just out of curiosity for how it is on average.