I want a dog but I’m 19 in my first apartment

I’ve wanted a dog ever since my mom dumped my childhood dog at the shelter. When I was 13, my cat died and instead of my mom asking me if I wanted another cat, she offered for me to get a dog….of course I said yes (I was 13 YEARS OLD) 😂. We rescued ally, a 1 year old hound mix from the shelter. Fast forward 4 years later I get a boyfriend and I start sleeping over at his house. (My mom had 2 dogs of her own and she always fed my dog with her dogs and took care of all of them together because that’s what worked for us)….(even though she was my dog). It’s a weird situation…..anyway she was upset that I wasn’t coming home to care for my dog and my dog started fighting with hers, so to fix it I would come home 3 times a day to feed pee/potty/walk and take care of my dog even though my mom usually did all of that keep in mind that I was 13 years old when she got me this dog (I still loved this dog and wanted this dog but I was also growing up and learning how to be an adult) that wasn’t enough for my mom. My mom gave me no warning and dropped my dog off at the shelter. This SHATTERED my heart. She tried saying I didn’t care about my dog and that my dog had become aggressive towards hers. (This all happened in 1 month) even 2 years later I’m not over it and this has really put a hole right through me and my mom’s relationship. I moved out and got an apartment of my own. I’m working, and have worked enough to save up over 5,000 dollars so far in only 2 years as a 19 year old student/part time worker/with an apartment. I miss my dog more than anything. It’s caused me to be not only severely depressed but filled with anxiety. I miss having a companion and a purpose in life. I can afford a dog, I have time for a dog, and Im fully prepared for the longterm. The only thing is that my landlord is weird with pets, and I considered training my dog for my anxiety, but I feel as though that would be lying. I do think I could benefit from a service dog for anxiety, but do I need it? I don’t know. I feel like that’s an insult to people who really NEED service dogs. Any advice would be appreciated. I don’t have any family to guide me and I’m all on my own. Thank you 🙏 ❤️.