I am a single mum with 2 kids who are now aged 7 and 4, I had my 7yr old when I was only 16 and my 4yr old when I was 19 (Same father) He just liked to come in and out of my life lol, as far as being able to shower and stuff, Id usually take a bouncer in the bathroom with me cause I wanted to make sure nothing went wrong while I was in there, Baby monitors are fantastic too.
Im now pregnant again, And yes still single atleast this time my 7yr old (who will be 8 by the time bubs comes) can help me out

Single mums do just fine and sometimes better when not in a stressful relationship, Good Luck and if you need someone to talk to or any advice pm me