To give you a better "long text" or specific guide, let me know:
Which are you playing? (e.g., Minecraft, Roblox, GTA V)
: Set Invisible:1b so only the floating text is seen.
: Generate floating text or "holograms" by summoning entities (like armor stands) with the no gravity tag. Gravity Mods by Game Popular Mod / Menu Minecraft Gravity API
: Add the NoGravity:1b tag so the text stays suspended.