You don't need an OLED display, especially if you're a creator just starting out.
The colour accuracy will degrade overtime with no permanent fix because they're vulnerable to burn-in. Sure you can get it accurate again through calibration, but it will become progressively difficult to do so until it becomes almost impossible to get it accurate. There's a reason most professional monitors today are IPS, and not OLED as the former can display colours more reliably against the latter.
Monitors will get inaccurate overtime, but OLEDs will do it faster and will likely become permanent sooner. In that sense, an OLED screen isn't a good investment for your intentions.
Edit: Also yeah, panel type doesn't equate to better colour accuracy. You could have an OLED screen that loses accuracy under certain conditions like displaying a bright image. Heck I don't even trust my phone anymore for colour-proofing.
I always suggest a screen that's at least capable of accurately displaying the full sRGB colour space, as that is the most common type used by most media published on the internet.
If you're mainly just posting digital art on the web, then sRGB is likely all you really need. Monitors that can do this are relatively inexpensive these days.
Note though that there's a difference between colour gamut capability and colour accuracy. You could get 2 screens capable of 100% sRGB but one could have overly-saturated/washed-out colours.
It gets a bit more complex if you're working professionally in the creative industry as different types of work require specific colour spaces.