One useful thing to do is take what you've done and think about how it could help in the sort of job you want to apply for.

Thanks! Yeah, so far I've definitely been tailoring it to a pet industry/animal care job, since that's where all my experience is. Hopefully I don't end up having to apply to like a restaurant or something haha, most of the stuff on there has to do with animal care and knowledge

Some of my tips are regurgitated from high school but have been useful to me, other things have been picked up along the way.

The overarching guideline is you want your employer to have the most important stuff jump out front and center. The most relevant things should be VERY easy to find on the page.
1) Start with a good resume template (you can find them from google).
2) Contact info should be up top.
3) Indicate the position you want With "Objective: " and then a brief description of the position
4) your name of high school and college, degrees earned, when you graduated, GPA. If it's something you don't find impressive, give a (very) brief statement of a class you did well in and emphasize the relevance of those classes to your position. It can be abstract, like "problem solving skills" or critical thinking. But better if it is tangible.
5) List employment history. Where you worked, what your position was, when you started and quit, and what your duties were. Make them sound important. This can take a bit of finesse. Instead of "customer service" consider "assisting customers with questions related to animal care" It's more descriptive and demonstrates what you actually did. Your volunteer work looks GREAT on a resume! Include that and indicate that it was a volunteer position. Same with your freelance pet sitting. If you found your own clients, indicate that. That's a useful skill. Freelance anything is good. You just gotta make the language clear, concise, and descriptive. Put yourself at the heart of the action when describing what you have done in these positions.
6) If there are relevant courses to what your job will be, in high school or college, list them, prioritizing recent courses. In this list explain, similar to your work experience, what you learned that was helpful.
7) Awards and honors. If you got any merit scholarships in college, list those. If you got any recognition for doing things at previous employment, list those too. Dates help
8) List references. Contact info and everything. Do not say "references available upon request." If you do your homework and line your references up beforehand, it demonstrates to your employer that you're serious about getting this job. Plus it makes their job easier because they don't have to call you and ask. Easier for them = easier for you to get hired.

If you want to bounce ideas off of me let me know. I would also be happy to edit a resume draft for you.

Oh wow, that's a lot of good info, thank you so much ;__;
I'm gonna tweak it around a little bit more, but I mean if you really wouldn't mind taking a look at a draft I would really appreciate that..

heck yeah! Send me a note when you are ready and I will give you my email address you can email the draft to.

Okay :3 thank you so much!