Relevant links/videos:
Blockstream Green Wallet Tutorial (using Bitcoin)
https://www.youtube.com/watch?v=uO3Zi9D5b0Y
Liquid Network Tutorial (hot wallet on mobile)
https://www.youtube.com/watch?v=jMDRWHBrQUc
Samson Mow Explains Liquid Network
https://www.youtube.com/watch?v=AqryGLX2ia0
Swap Bitcoin for Liquid Bitcoin
https://sideshift.ai/btc/liquid
https://liquiditi.io/
Sideswap App
https://sideswap.io/
More info on Liquid Network
https://blockstream.com/liquid/