i mine on my slow computer also just for fun. i've never struck anything big but its fun and enjoyable . if its just you you will keep the reward but if others are in it and you upload it in a pool it will be shared

I built a script to mine on my slow computer for fun. I have never found or submitted shares to the pool. My computer is 100% receiving work and hashing away. Can anyone recommend a solo mining pool where I can adjust my difficulty and actually find shares while mining with 3 MHs? I have another question if I never submit a share to a pool and a miracle happens and I find a block do I not get the reward?