Having a hard time transitioning..

My baby girl is 12 weeks old and has been sleeping with a transitional sleep sack with both arms velcroed against her body. She's becoming quite active so i wanted to try to make her sleep with her arms free from the swaddle. It worked for one night. So we decided to do it again and this time transition her to her crib in her own room instead of the bassinet in my room.

After 1.5hrs of rocking/layingher down/picking her up when she cried, we swaddled her back and put her in my room.

Anyone have any tips to help make this easier? Once swaddled, she falls asleep instantly