Hi, welcome to BW
Happy to hold your hand as you find out what works for your baby (they're all a bit different, so we have guidance times but work out what suits each baby because we're not all average). We call EASY a routine, not a schedule. That's because we follow the same order of events to give you and baby predictability. We say to eat/feed, then play/activity, then sleep. That helps set you up with the least likelihood of feed-to-sleep associations which are very tricky to change.
We have a few questions that are super-helpful to have answered, just so we're not assuming things:
What settling techniques are you using?
When is he feeding?
How is he feeding?
How is he settling to sleep?
Where is he sleeping?
Does he have any medical issues (prematurity, illness, etc.) and have you had any advice from medical professionals that you need to follow?
I think one of the first things to do is to try (I know its hard, esp. with anxiety) to relax a bit and just take a few days to really watch your baby and get to know her cues. Some babies at 10 weeks can do 1.5hr A time and some still haven't fully woken up from that sleepy newborn phase and are still needing a nap after 1hr. I think its reasonable to take some of the guesswork away by watching the clock for 1-1:15 A time then watch baby for 15mins and put down for a nap at 1:15-1:30 A time. I think you know him best and can determine if he's a very sleepy baby who needs a shorter A time or if he's ready to go towards 1.5hr A times which is fairly average for 3 months.