Is it possible to make a brilliant move in less than 10 moves?

It will be a lot easier for you when you understand that a brilliant move is just a decent sacrifice.

There is nothing particularly brilliant about it.

5. Bxb4 is brilliant if you put it in game review. White can’t take the bishop because of the pin on the rook.

I believe this would count as a brilliant as well.

The lowest number of moves to get a brilliant is actually three, as seen above.

Opening traps that lead to checkmate are usually brilliant as well. For example, the Legal Mate. (That's not the exact name, but I'm too lazy to spell it properly. Lol)

The Scotch Gambit has an extremely common line in the 800-1400 elos that comes up here and there. One thing I will say though is don't switch openings just cause you want to get a brilliant move. Getting a "theory" based brilliant move is 1/100th of the satisfaction as ACTUALLY finding a brilliant move. Its simply an annotation on the site, it shouldn't mean much to you.

I got a brilliant move using the Italian game in just 6 moves

the damino defense is one of the worst playable openings in chess

Oh contraire.

Move 8.