Sounds like you are doing a great job. He is a sponge right now so he will want to know what everything is called. Point out things that you see in the sky on the ground all around the house. Teach him colors, shapes, animals, foods, feelings.
Everything you do he will be watching and storing the info in his little brain and when you least expect it poof, he will surprise you.
I assume he is walking? If not he will very soon. Then you can teach him to climb on small slides, how to pull or push toys while walking. Teach him to pick up and put down toys (action words). Give him directions. "Please go to your room and bring me a book". You will be amazed. Build up to multiple directions. "Please go to your room and bring me your Winnie the pooh book and your tennis shoes." When he follows your directions, always tell him "thank you".
Read, read , read to him. Show him the pictures, ask him questions, ask him his opinion. Take him to parks and to events. Play all types of music in your house and in the car. Talk, talk ,talk. His vocabulary is endless at this age. Teach him to share. Teach him to put toys away, teach him to pour (first in the bathtub), everything is a teaching moment, but it is the stuff we all take for granted. Enjoy him and take a ton of photos and videos. You can never have enough.