your two identities should not cross paths in any way, they should be the farthest away from each other. This should go without saying but you shouldn't mention your other identity to anyone, the only one you should trust is yourself. alot of infamous internet criminals get caught because of that first step, even though they hide themselves better than anyone, their real identity gets connected to their other identity and they are unmasked and caught. make sure you double check the simplest things, slip ups are not acceptable. you never know when a slip up can end up in you getting unmasked, better be safe than sorry. the excuse of having nothing to hide and thus not caring about mass surveilance is not valid these corporations shouldnt have your data.