Hi and welcome to the DP!
I think your pup is a puggle or pitbull shepard mix but idk.
For info on raising a pup. For me being prepared to care, raise, and nurture the pup was my main priority. Researching all breeds to know which fitted me best according, to my lifestyle. When i got my first rescued pup i had already prepared a crate, toys, bowls, food, leash, collar, etc. all ahead of time before actually searching for a pup. Took him home and started with the naming and teaching my pup his name. Took about a month to learn his name successfully. During that month, I taught him basic commands, housebreaking by using a crate. Introducing him to Rules of the household, letting him know who is alpha, leash walking, grooming, and Especially Socialization
since the puppy era is the most crucial period.
I left out a lot but, if you have any questions fell free to ask.
Almost forgot SHOTS, SHOTS, SHOTS!
Its critical for a pup to have their shots and vaccines since it really is crazy how Parvo-Virus can ruin you and your pups life.
and the internet is a great a source. DP for example