Yes, if you received the LP token Uni-V2, then you don’t need to worry. Your balance will be deducted. If you’ve successfully staked on Sushi, then you should see some SUSHI you can Harvest here.
Don’t worry, this yield farming thing is a bit tricky at first, but once you grasp it, it’s easy and can be fun. Yield farming is relatively new, so most of us are quite new to this. I’ve only been doing this for a few weeks too. It’s very addictive though. :)