I have a 3 month old and TBH I don't know what I used to do with my time.
A usual day pans out like this - we are usually both up, fed and showered etc. by 9am I then try and fail to get DS to nap and so I usually pop him in a sling and either do chores round the house or go for a walk.
After his 10am feed I usually go out and do one of the following- rhyme time at the library, baby sensory, swimming, coffee morning, cinema, meet my mum, have a play date.... If I have nothing planned I may go for a mooch round the shops but this is rare.
If I am away from home I usually stop in a cafe to feed and change DS around 1pm (as I am right now!)
Then I usually go for a walk/ do something else in the afternoon returning home in good time for DS's 4pm feed.
I then try to keep things low key, he has a kick about on his mat while I prepare dinner/ do some other chores.
Then it's bath and bed.
My days fly by but then I am fortunate to live in an area where there are lots of groups and things to do with babies. I have made lots of friends/ acquaintances with babies the same age and so there is usually someone suggesting something to do.
Oh and I have just got back into the gym - they do sessions where you can take your baby and either leave them in their car seat or on a play mat.
It's really important for me to get out every day. I get cabin fever staying at home all day plus the house gets messier if I am in it 