6 days in and Tandeming

Well, they are 6 days old and I cannot stand letting one cry while I take forever to feed the other one so I started tandeming today. Somehow I started it on my own but it is really hard. They move their arms in the way all the time so you cannot latch them and they are so floppy and small. They fall asleep and need constant waking up. My milk spray out (massive let down) so I need help wiping all the slip away or they cannot latch.