Is it possible to create your own font and put it into ROBLOX?

If there is a way and a good way to tell me thatd be great! or put in more

Technically, there's two ways to this.

1. CSG unions that are letters.
2. Decals with transparent letters/numbers. As Volodymyr2004 said, there is some ways. If you're looking to do GUI's, then go with the decals. If it's for a lobby, go for CSG.

Yes you can find it here: https://github.com/Gskartwii/Rbx_CustomFont