Honestly, I think he's doing great
11 weeks is still very tiny, he can certainly begin to learn some self-soothing skills with shh pat but I would think it very normal for him to still need some help at this age. Particularly if naps aren't ideal and he's a bit OT. Paci props tend to cause issues a bit later in my experience, it seems like the 4 month mark (and 'sleep regression') is where you really start seeing the effects of accidental parenting. I probably wouldn't remove the paci at this age from a SIDS risk point of view if it is something he is used to - 6 months is I believe the suggested age for doing so if you wish. With regards thumb sucking, yes he may well do, but he might not. It's not the only way to self-soothe though - I have one who sucks her wrist, and have seen others suck fingers, the corner of a lovey, or just twirl their hair or cuddle a toy