Hi J.,
Congratulations on your wonderful new person! And thank you for breastfeeding him, on demand. It will be an incredible relationship for both of you, and the longer you do it the more physically healthy and emotionally strong and well your baby will be. Don't let ANYONE convince you that you should wean at 1 year old--it's the current fad, but it is not in any way required, "normal", or necessary, though by that age he will also be having solid foods.
For now, just know that the breastfeeding relationship is a continuously changing one. He is going to have HUGE growth spurts--often. At this age, just about the time you both get comfortable with a routine, he literally will grow another layer of brain cells, another inch of length, another pound of muscle, bone, and fat...it's endless! And it can be sort of confusing for both you and the baby.
You should absolutely keep feeding on demand. He is far too young to try to put on a schedule, though if you pay attention, you will find he will work himself into regular patterns that could be called a "schedule" but are more of a "dance"--with rhythms that shift periodically (sometimes every few days!) based on his growth patterns and development. It is more like he will put you on a schedule than the other way around, though of course, your own needs have to fit in there as well.
As far as sleeping, some babies will sleep at very regular times, some will sleep for an hour or two at a time, some will sleep all night from the beginning (if you can call 4-5 hours straight "all night"), and SOME, the little dickens', will never really fall into a regular sleeping schedule or take long naps during the day. I've had three daughters, and each one of them was vastly different on their sleep patterns. Don't worry, as long as he's growing, alert when he is awake, and doesn't seem to have any pain or anything that is keeping him from sleeping. He'll do exactly as his body is programmed to do.