That sounds fine to me and is very similar to what my son has, he's 4 months old. The only difference is that unfortunately, since hitting the 4 month mark, he never has a long nap in the mornings anymore which used to mean I could easily get ready for the day. Now I have to do what I can in 30 minutes.
My son can stay awake happily for 90 minutes but then starts to get grumpy. He can't go any longer than 2 hours before he gets overtired and is then difficult to get to sleep.