How do you know time does not exist outside of the universe? That's impossible for you to know. The only Being outside of time is Allah. Other than Him everything is in time. When he created the universe he did in the measurement of six days( periods of time) so your question is baseless
Islam doesn't say you HAVE to. There is no forced conversion in Islam
Sura Kafirun( The disbelievers )109:1
Say, "O disbelievers,
109:2
I do not worship what you worship.
109:3
Nor are you worshippers of what I worship.
109:4
Nor will I be a worshipper of what you worship.
109:5
Nor will you be worshippers of what I worship.
109:6
For you is your religion, and for me is my religion."
So beautiful....Islam the religion of tolerance
Islam doesn't say you HAVE to. There is no forced conversion in Islam
Sura Kafirun( The disbelievers )109:1
Say, "O disbelievers,
109:2
I do not worship what you worship.
109:3
Nor are you worshippers of what I worship.
109:4
Nor will I be a worshipper of what you worship.
109:5
Nor will you be worshippers of what I worship.
109:6
For you is your religion, and for me is my religion."
So beautiful....Islam the religion of tolerance