Full Custody question .

So basically me and my babys father arent together anymore. We have a 2 year old and a 1 year old. He blocked me of everything so theres no reason or anywhere to get ahold of him or me because basically he wants nothing to do with me and the kids. So my mom told me to file for full custody/ restraining orders/ child support on him… but idk how to do all that… sadly this is new to me and i never thought i be in this position seen so many people gone through this and now its me💔 wanted a happy family but he chose girls and his friends instead of us. 💔which brings me to tears and depression so bad… 😰been crying and feeling so alone . i have my own place with my kids and i feed them provide basically everything for them. Im lost on how this whole process goes.. i should get full custody but if he wants to see them can he have just visitation rights? Not full custody right? Since the babies sleep with me of course and live with me forever . And how about child support.. i dont make much at all but he does .. can they give me child support from him ? Even tho he doesnt have full custody but will still see them if he wants too… ? Since i pay for everything i buy them pampers and food