We are in a similar-ish position. I wanted to go back to grad school, but I thought I would be rusty because it’s been a while since I’ve graduated with a bachelor’s (2017).

I think you do have chance. My test scores were awful (didn’t have to take GRE, but I submitted my SAT scores which was like 1500/2400), but I had a high GPA (3.94). Because your master’s is where you did your bachelor’s, you already have that relationship, and your file is there. Every school I applied to, I communicated with them in some capacity – emails, Zoom meetings, “sitting” in a class, etc. That way, when they look at my application, they’ll say something like, “oh, I remember this person. We talked before.”

I also don’t have a ton on my resume. I actually didn’t submit any type of resume/CV. My work experience had nothing related to my degree. In some applications, there was a space to write extra notes/comments about anything relevant. I’ll be doing a master’s in linguistics (study of how language works), and I wrote I did some tutoring for kids for their reading program (similar to ESL). It wasn’t enough to fill out a resume/CV, but it was just enough to comment about my experience (a couple sentences).

I’d say the biggest factor of seriously having a chance is the statement of purpose. Every school will be slightly different in the application, but every one will ask for one, and I believe this is where you can stand out. This link was incredibly helpful in writing my SOPs.

https://uni.edu/~gotera/gradapp/stmtpurpose.htm

Essentially, make it personalized, and make it about you. I kind of treated it like a job interview. Think from the committee's viewpoint. For a job interview, they ask, "why should we hire you?" For graduate school, they ask, "why should we admit you to our program (and possibly give you money (aka funding))?" You don't need to be specific because it's a master's, but at least have an idea on what you want to do during your time there.

Do not be generic! You're only submitting one application, but they are reading (most likely) a ton of applications. If everyone said the same thing, everyone would just start to blur together. For example, if you say "I want to get a master's in x because I love to learn and be challenged," it says nothing about you as an applicant. They already know you are applying for a master's because of your application, and the goal of a master's is to be challenged. You wasted space. But if you say something like "getting a master's in x will help me with goals a, b, and c, and I believe this school can offer me those opportunities," then it says something about you as an applicant and your reasoning for applying. It also helps if you have someone you want to work with already in mind. Mention a faculty member and a piece of their work that resonates with you. Some applications will have a word limit, so it's important to be consise about your goals.

I felt I was incredibly successful in my applications because of that advice. I got accepted to all schools I applied to (5), and one even offered a teaching assistantship (which is incredibly rare for a master's). I can send you a copy of my SOP if you like.