As @TheDevDoge stated, there is already a game like this, and if it’s too similar, you likely could just get into controvorsey or just a lack of players. So, unless if you explicitly make your game more unique compared to that of uglyburger0’s version, I doubt you might go anywhere.
If you want a personal recommendation of mine, perhaps try to make a single-player game in which you are a survivor that has to do tasks to survive and possibly escape SCP-3008.
No, you will fail badly.
The core concept is a copy, no matter what small unique features that you might add.
So, either change your direction or accept the fact that this stays as a skill practice.
Agrees with @TheDevDoge and @Gavin42307
Well, this popular SCP 3008 was based of another game that is not from roblox, so it’s not really stealing, also there’s wiki, which has the first and original SCP 3008. The site has been hacked, so I can’t send the link to the original right now.
SCP games are fan-art. One game existing about an SCP does not mean it is not allowed to make another game about the same SCP (however monetization around this is questionable since you would be profiting off of the IP of someone else, it depends on the license covering the given SCP article and its related images).
Just do what you enjoy, no other Roblox game about SCP can stop you, but be mindful of IP theft. The whole SCP genre on Roblox is legally dubious, but I believe every article has its own separate license, you should check this before doing anything.