There's lots of cases where many have thickened hair. Based on your pictures, if your hair thickens up, you'll return to a norwood 2, but possibly a bit thinner than before you receded.
There's also lots of cases where many believe finasteride worsened their hair. The problem is we don't know if:
1. They are not a good responder and their hairloss progressed
2. Their hairloss was too aggressive
3. Finasteride really did trigger something and their hairloss accelerated
I see it this way. You're already close to a norwood 3A at 24, if you don't do anything, you have a good chance of progressing possibly further. Ask yourself if you will be happy if hairloss stopped at norwood 3A or if it stayed the same as it is now. Or you can take the chance of slight sides with a chance (higher chance than getting worse due to finasteride making it worse) of either maintaining(you can go hair transplant route) or getting thickening/regrowth(you may be content and not want to do a hair transplant).