Well as you guessed i am new in the world of bitcoins and after testing my GPU i can barely rach to 50Mhs/s
So... experienced people of bitcoin what kind of pool should i join ? its my hash rate worth in some way?
At 50 Mhs/s, your contribution to securing the network is negligible. To that extent, it's a shame.
If, however, you think a bitcoin could be worth a fortune someday (as many people here believe), then the 'negligible' amount of bitcoins that you mine today might not be so negligible in the future in terms of value.
If you don't plan on becoming a serious miner and don't plan on spending a lot of money on new mining hardware, then my recommendation would be as follows: Mine bitcoins for a month with your 50 Mhs/s. Bite the bullet and pay the couple bucks you'll actually lose due to electrical costs. Then, store them on a USB stick or three, and wait 10 years. Think of it as a cheap lottery ticket. But of course, you could just buy some Bitcoins, or better yet, sell something for them!