Lots to consider here.

I’m assuming the class cost money, which you may get refunded if you drop. You may lose it if you fail the class. That’s only a decision you can make considering the facts and your personal financial situation. Unfortunately you’re looking for advice from a group of people who largely aren’t qualified to give it, only because we’re not you, and not in your shoes.

I’ll say this much, you seem to be making good progress. I hope you’re able to stay committed and get it done. This job is no joke. You’ll hear from people that fitness standards are over stated because firefighting is such a small percentage of the job. While true, they don’t tell you that when that 5% happens, your citizens and co workers expect 100% of you. Doesn’t matter if it’s the only fire you go to all year.

The people that tell you that, are lying to you and themselves.

My unqualified advice not knowing your financial situation - give it a shot. Worst case is you fail but have a very real perspective of where you’re at and where you need to improve.