DESPERATE for help

My son is 5 months, still sleeps swaddled and wakes up 4 times between 8a-8p. His doctor said hes at the point where he can and needs to be sleeping throughout the night and no longer be swaddled. She suggested gentle sleep training and I plan on starting Monday! Does anyone have any methods that worked or any tips? I know it's going to be a long week but I'm ready for it and I can tell my baby is. Right now, he will wake up, can't put himself back to sleep, sucks on paci for a min or two then cries more so I give him a bottle, he drinks a little then goes back to sleep. Any advice is welcomed!