Help on baby behavior

Hi ladies

i have a one month old. I'm managing the baby all alone.
First week of birth he was calm. Had his feed and slept.

Now after second week he is fussy had few reflux issues. Wants to be fed always. Keeps crying all the time he's awake. Wants someone to hold him always.

Or or he wants comfort sucking. He hates crib swing car seat.

I have never dealt with babies and this is very new to me. I am tired and lost patience.

Ialways thonk what what could be wrong. I know babies do cry.

Whenever I visit paediatrician I see other babies very calm and enjoying in their car seat. Only mine creates crying problems

I want to know are all babies like this or only mine has this issue.
When do babies get calm.
Now I have to be with him all the time. Until hubby returns from office. Even I can't bath eat do anything. Coz he starts his end of the world cries.
If mine gets calm I can attend to other chores while leaving him on the crib. Pls provide inputs other momies. At what age do they seem to sit calm