I know where you’re coming from, ;)
I’d say best thing to get supply up is skin to skin as muuuuuuch as possible, and Bub on boob as much as she wants too without any restriction ...the early days demand feeds are intense but they are what gets supply established best ;) there will be time later to fall into a routine :)
The more they are on the breast the more the body’s reacts by producing, and things will adjust pretty quickly by following baby’s cues ;)
And in the end, if using a means to monitor feeds etc helps you, no harm, of croise..happy mum = happy baby, whatever works for you ;)