put 2 mth old baby to sleep

My LO is almost 9 wks old, recently we have trouble putting him to sleep in the day. He easily wake up when we put him down, and even he can sleep, it only lasts for a few minutes. I have tries 4s ( setting, swaddle, shush - pat, sitting ) by Hogg's Baby Whisperer. But doesn't work. He would struggle if swaddled, and fuss... he will only sleep longer when carried. Plus he likes to put his fist in his mouth, I have tried giving him pacifier but he doesn't like it, and sometimes it confuses me on his feeding/sleeping cues... Any suggestion ?