I am a single mother of three, one is a young adult that is confused in his own right. I have an autistic son that is six ft tall and unmedicated( i'm 5'2"), and last I have a 15 year old daughter who is very much shaped as a woman. I have lost a son to crib death. I have lupus and fibromyalgia, i get guilt feelings because my illness does keep us from doing other normal things. I feel guilt over the whole lackof the "complete" family union aspect of it. HOWEVER, I have also come to realize it is what it is. The reality of who we are as a family is fact, I can't change it, but I can parent within it. Things I have learned: ( unfortunatly I gradually learned these things while my oldest was late teen) 
Don't take their lives for granted, always say you love them, always hug 
Pick your battles, may sound qliche but..really..they can keep their messy room..just pick up after you shower ,you dig?, 
when it comes to what they wear..their friends will tell them they look stupid..I don't have to. 
NEVER get into an argument with them..someone always has to win and after the fighting starts..it better be the parent that comes out on top 
It's easy to get into yelling matches..especially if your a young mother..but just don't do it 
You said no..keep sying it 
I also have explained to my kids that rules are to keep them safe, not to punish them 
I tell them not to do "things" for example as they are leaving to go out i will say" no drugs, no drinking, no kissing, no sex, and I always add"thats what college is for" 
I do read my daughters personal journal on occasion..the problem with this is...know that you might read somthing you don't want to...but..you can't react on a harsh level...she doesnt know i have checked on her, I'm pretty good at thinking of ways to start a conversation which will ultimatly end up in her confiding in me.  
Parenting is hard even when there are 2 ppl. In our case, I have made a decision to work with what we have...trust me it's not much..but we do it. 
one last thing ALWAYS EAT A MEAL TOGETHER!!!!! sit at a table, say your before meal prayer, turn off TV, and enjoy each other..or on some days..pretend! 
PS. When they really get to me, I am famous for turning on the exhuast fan over the stove and pretend I'm stirring something so I can bitch under my breath about them!!!!then turn around pleasently and say" what was that sweetie"? 
Take it easy and keep it real.