HELP !

Is there anyone out there that can help me ? I've been TTC for the past year with no luck. Doctor has had me on medicines to try and help me conceive , and it hasn't worked so far. She told me that if I want it as bad as I have been , I have to make major lifestyle changes. I am a smoker (working on making that an exsmoker) , my diet is horrible , and the only I activity I usually get is while I'm at work. I have depression and anxiety so if I'm not at work I'm sleeping. I have blamed my smoking on my depression and anxiety as well. My doctor doesn't want to put me on an antidepressant due to the fact that I am trying to concieve. I need help, I have no clue where to even begin. I need motivation. I need someone to help guide me through this major transformation. where do I even begin ? I am 5'7 and right af 185 pounds. Doctor wants me to lose at least 30 pounds but I want to make this permanent. My doctor agreed if if I can show I am trying my very best that she will be more than willingly to help and if she can't she will send me to someone who can. I need all the help I can get.