Is it fine to mastrubate with all 5 fingers in?

I recently started mastrubating, i felt so good, i usually grind myself against my bed post and slowly put 1 finger in my clit and increase the number of fingers. So at my first time, I put 5 fingers in and it didnt hurt, is this normal?
I also have been trying to ejaculate myself by going on the G-spot, but it doesn;t work.