Help, I don’t know how to raise my puppy

She is a street dog, 3-4 months old, had her for 2 weeks. My knoledge is limited and before her i had a labrador that was so easy to teach.

New 3-4 month puppy owner here that needs adivces. She has unkown traumas cause she lived on the streets and in the first week we worked on trust. She is so smart that even tho she is scared of us she is trying so hard to trust us. I am very confused in some situations. I go out with her for 10+ times a day, we play in backyard, i let her sniff, dug in dirt, everyting but she won t poop and pee. I can stay with her for 1 hour but the minute we get in she will go use the pad. We even take the pad outside and she will smell it but not use it. Even leaving her alone in backyard won't do cause she will cry. In training we still have a lot to learn, but when i'm commanding her, she will do it for a few minutes than she will start grawling or barking and jumping on me. When she wants to nap she will not do so if i m not in the room. The minute i move, she will go after me. I am still trying to make her go in her bed, but again when i train she barks. When we play she will bite very hard and won t listen to stop, and if we give her toys she will try to bite our hands. When we walk around the house she will be glued to us to the point we will step over her and fell. We don't want to teach her to stay on the couch or our bed but we found her on the couch. When my bf is leaving for work in the morning he will take her oustide and leave her in kitchen with all her toys and bed, but the second she is alone she will cry and destroy the floor, jump on doors, me being next door. This is new. We only have her for 2 week and I want to belive we can be better than that. I will distract her but won't listen, neither saying no, neither timeout etc, and I confess that i wasn't a good parent sometimes and i hate myself for that I do not know what to do so please help me. It's very overwhelming and we live in a place where street dogs are so many and she won't survive. I'm glad i saved her, and i love her, but i want her to be more deciplined. I am crying everyday cause i get angry and i feel so sorry for her to the point i lock myself in other room for hours. I don't have money for a trainer, nor a create so every tip is hopeful. Sorry for bad english.