Moving out into apartment with bf!!!

Im 19 and my boyfriend is 21 and we have been living with his dad for the past year and we’re finally ready to move out into our own apartment. I’m beginning to look around for furniture and decorations because we don’t have many things to bring with us, but I’m trying to be mindful with how I spend money because we both hate spending our money willy nilly lol. So what I’m trying to say is I need advice on where to find cheap furniture specifically sofas, coffee tables, dining tables, and chairs. And if anyone has any other advice for first apartments that would be greatly appreciated!