Sensitive baby/sleep training

I have a super sensitive baby, very emotional but I’m wanting to try a sleep training method to help him sleep better but I’m scared. Once he starts crying it takes a lot to get him to settle back down and then the whole night he is a wreck from him making himself so worked up and sick. Anyone else have babies like this? Have you tried sleep training? I need help! He is so cranky all day because he isn’t sleeping well. I get only 30 minute naps from him. I need something to change, he needs more sleep! What methods have you used with your more sensitive little one.