You’ve got a decent bike so any upgrades are going to be either:
1) small upgrades for a very marginal,if any, gain, eg carbon bars.
2) fancy upgrades which would be pricey, a bit out of place on the bike – what I mean is you’d be better off saving your pennies and just get a better overall bike.
I’d go for riding it a lot (which sounds like you do) and go for quality but value components as things wear out.
If you really want to spend your money maybe some fancy riding gear, eg gloves, helmet, shorts which you’ll keep between bikes. Or some tech like a hrm or gps, etc.