I need help

so I am married and me and my husband has 4 daughters together and he has a daughter from a previous relationship we have been married 6 year I suffer from severe depression anxiety ptsd bipolar and a few other things mind you all our kids are 5,4,2,1 and his daughter is 9 he wants me to start fixing myself up again and start doing more to myself I need advice on how to do it because I can't leave my kids while I do everything I need to my kids get into everything and how do I get the momentum to want to...