I know this is a bit time consuming...but just curious how everyone elses babies are doing with their schedules at this age...

Our schedule is like this

6am-Wakes up and BF goes back to sleep
8:30-9am wakes up, BF
9am to 12 pm - plays in playpen while mommy showers, tummy time while mommy gets dressed, sometimes we go out and run errands (he will usually nap in car)
12 pm- BF then naps
2pm wakes up and BF
2-4 tummy time, sits in bouncy chair with toys, sits in bumbo chair and loves watching his big brother (he's home from school at this point)
4pm- BF
4:30-5 plays on activity mat, tummy time.
5-6pm sits in bouncy seat to watch his big brother and mommy eat dinner
6pm BF one side...Sometimes takes about a 30 minute nap
7:30 BF other side and sleeps for the night

Any suggestions of other activities i can do with him at this point? He can hold his head up but not sure if i can start using the exersaucer with him yet...im scared he'll bop his head foward and bust his lip...he doesnt like the swing too much, so we hardly use it...he'll tolerate it for about 10 mins...
I would love to take a walk with the 2 kids in the afternoons, but my 3 year old will want to go to the playground and he has autism and needs one to one attention when we go to the playground.
Sorry so long...looking for other ideas? TIA!