Hows this waltz I composed?

https://musescore.com/user/28048203/scores/5171640

It’s correct. But in general you don’t take risas. Harmony and Melody stay sale. You can explore more for the left hand. 

I agree with Luis, you should try to vary the left hand more.  The parallel fifths make it sound blocky and heavy (and technically should be avoided whenever possible if you're trying to write in a conventional western tonal classical style.  But a good effort.