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May I ask what version of windows you are keeping on there?
If windows is vital and you aren't partitioning half the drive I think its worth it. \
As for linux distro's I heard good things about linux mint, but to be honest I haven't seriously messed with linux, and the only two I have messed with are redhat and unbuntu, of which I recommend unbuntu for desktop use.
Windows 10 is. . . unoptimized to say the least, take a look at windows ame. basically some people stripped out windows. The subreddit has downloads you can access without having a telegram account. Make sure to verify the hash though.
I am only suggesting it because I have a similar situation with a older laptop. Linux runs fiiinne on it. For gaming though, especially steam games, you will lost 10-20% performance running steam games on linux. Windows ame actually takes less background processing power than normal windows. On a very weak pc, 10-20% can be the difference between playable and not.
If your not using it for gaming, disregard all of this.
TL:DR
Heard good things about linux mint, only actually used unbuntu and redhat.
Windows AME may be good to look at if you need a stripped out windows for a weaker machine, but is only really worth it for gaming.