Swaddle transition

My baby girl is 7 weeks and will only sleep at night if she is swaddled. She’s getting too long for the Velcro swaddles that I have and gets angry and starts kicking her way out. She loves to suck on her hands, but her arms still go flying all over the place so I’m worried that leaving her arms out will wake her. Not sure though. I wanted to try sleep sacks, just looking for recommendations if anyone’s little has gone through the same situation. TIA!