>>2923518> Is a flash diffusor enoughWith your on-camera flash? Nah. Not really.
The thing you might want to do most often is blast a wall or ceiling to get diffuse light, and your dinky flash won't do that well.
With a small light source and small diffuser for it, you'd otherwise almost have to hug people for the light still to be diffuse.
> Or should I invest like 50 bucks into a flash?If you don't care much, get a ~$35 flash off the "popular" choices on Aliexpress. It will still do a bunch of shots okay.
If you want to get some more use from it and some shooting comfort, I'd advise to fork out $75-ish for a *great* YN660. With fast recycle times and high brightness and easy operation and the option to complete into a (cheap but reliable and easy to operate) RF controllable manual flash arrangement.