Congratulations on your new guy!
Inactivity is often a sign of being too cold. Is your bowl heated? What temperature is the water at right now?
Bettas are tropical fish that originate in hot & humid Thailand. A tank with a heater set to 78-80 degrees is ideal for them to live a good life.
Also I reccomend a tank 2.5 gallon or more. This gives your betta a decent amount of swimming room and also requires less frequent water changes since ammonia doesn't build up as fast.
Are you using water conditioner? :)
“Some people talk to animals. Not many listen though. That's the problem.”
― A.A. Milne
Espeon female halfmoon / 10G
Jolteon male dumbo plakat / 10G