So, first, play the game a little, until you have enough angels to restart (somewhere around like 100-300 angels)

Then restart and go on! it will just go a little bit faster, but dont worry, just reset again when you have somewhere arround 300-500-700 angels!

!IMPORTANT!: watch out buying managers for 100 angels if you only have 200 angels! these wont help much and only make you slower! When this happens it will ask you if you really want to do it, but still watch out. You can also purchase a button (with in-game money) that will Quick Buy all SAFE angel upgrades.

so, now you know the start. the only thing i'm gonna do now is showing you the numbers that (COULD!) be usefull to restart.

from the beginning! (don't worry if you got to much, its even better ;) )
100-200
700-800
1200-1700
3000-6000
10,000-30,000
70,000-100,000
400,000-700,000
2,000,000-4,000,000
... (from now on start to double the amount: 10,000,000 then 20,000,000 then 40,000,000 ...)

You can also just double your amount of angels, you start somewhere around 100 angels and then you just double it (from 100 to 200 to 400 to 800 to 1'600 ...). Sometimes it can easier to go from 1'600 to 2'000 and then double it further and do it over again at 20'000.

Anything wrong with my grammar? Pls tell me because my native language is not English...
Thanks for the help and good luck with your business! Have alot of moneyz!!