40 minutes meeting -skype

[VasilisNikolo]

hello.
1)i am teacher of mathematics and i am using zoom.I try skype after 2 years but my student do not hear my voice.Should signup the zoom ?I have enable at the same time both of the programs.(skype and zoom).Should not use both of the softwares at the same time?Or is another issue?The microphone is on for the skype.Also i try to record a message by skype but i can not hear my voice.I have win 11
2)I noticed after the ending of 40 minutes of my meeting (i am a free user) i can not resign
immediately as in the past.Should wait about 10 minutes.Is that normal?