Groove Hole on curve surface with good topology in Blender

Just an unemployed[know blender ,solidworks ,machine learning,java ,HTML,CSS,javascript Advance level] guy who is trying to earn some bucks I will be thankful if anybody can provide any kind of support or job you can download my project on gumroad.
Instagram : / mouryaworks
Facebook page: / mouryaworks

[@syamsuldiongninri]

8:16 why don't you use a grid fill to cover the top and bottom of the cylinder?

[@MouryaWorks]

Well I was not getting the good results so i didn't use it

[@syamsuldiongninri]

I support your channel, keep working

[@gumzo2509]

Amit you are amazing

[@MouryaWorks]

Thanks man really appreciate your kind words