Difference in shifts

I have to opportunity to get back on the over employed train but this one has a bit of a twist

J1 is a set 9 - 5 shift pattern

J2 is more shift work like a 4 on 4 off pattern with a mixture of night shifts in there

Just asking if anyone here is doing anything similar, a bit concerned that there will be a time I'll be working a number or days in a row

Wondering how people are getting on with this .. let us know as I am 50/50 on taking this on