I usually play games with my family.
We play Mario Kart with Nintendo.
Sometimes, we also go out and take a walk.
Also I do exercises for my health.
I watch YouTube to learn how to exercise.
It can be dangerous if I exercise right after dinner, so I just walk in the living room for a while.
I think they are pretty nice routines after dinner!

“Stand firm in the faith.”​ — 1 Corinthians 16:13
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I usually play games with my family.
We play Mario Kart on Nintendo.
Sometimes, we also go out and take a walk.
Also, I do exercises for my health.
I watch YouTube to learn how to exercise.
It can be dangerous if I exercise right after dinner, so I just walk in the living room for a while.
I think they are pretty nice routines after dinner!
= "On" is the correct preposition when talking about playing a game on a gaming system or console.
= A comma is needed after "Also" when it is used as an introductory adverb at the beginning of a sentence. 
= Great job!