Yep that looks like Galena alright. Streak test should be gray and when scratched with a knife will chip into little crumbly bits which if looked at under a magnifier will be cube like.... but you don't have to go that far you have some nice cleavages to look at already. If you collect about a gram of fine material and place it on a brick then fire it with a torch, carefully and use eye protection, you can smelt yourself a little bead of lead. Don't torch a large piece~ Galena will pop and shoot hot chips.
Congratulations to the young rock hound