You know exactly how good/bad you are because you can look up everyone else's jumps. That's the wonderful thing about track and field.
Look at your state's 2019 championship jumps. Look up your conference's 2019 championship jumps. Those are the marks needed for you to be "good". How "good" you want to get is up to you.
You're a freshman, so advice would be:
1: do what your coach says
2: work hard
3: understand that your body is going to change rapidly and that will help you.
4: have a specific goal you want to hit (ex. 41'0"). Not "best kid on my team" or junk like that.
And don't use your real name on the internet and say "I'm a high school freshman". You have no idea who is out there.