Hey Ricky, welcome to the forum.
Try to ignore the idiots like uncomfortable man, I have no idea what he's doing on this site anyway.
I reckon finasteride would be enough for you for the maintenance, without minoxidil. You probably don't need to regrow that much, but it's obviously thinning out at a young age. Have you talked to a dermatologist or your doctor about other possible causes yet?
To be honest, I think you could leave it for 6 months to see if it gets any worse before jumping on medication. It could just be going through a shedding phase and if you jump on finasteride now, you'll have to be on it for life. That is, unless something miraculous comes out first. If you're still losing after half a year then jump on finasteride and you shouldn't have any worries.