And if you want to have great fun while you're smartening up your left hand, play some Tchaikovsky waltzes, or even better, Joplin Rags.
Along the Tchaikovsky line you might try his Waltz Opus 39 No. 9 and/or Neapolitan Dance-song, both from Album for the Young.
They're for kids, both very pretty, but if your left hand is lazy, these will wake it up.
Go to
https://www.classicalarchives.com/, sign up for free, click on Tchaikovzky, click on piano works and scroll down to the work entitled:
Album pour enfants (Children's Album) No 8 Is the Waltz, No. 18 is he Neapolitan Song. I'm beginning piano again after a 23-year layoff and am working on both of these pieces. It really helps to hear them again and again.
Listen past some of the clunky midis, and hear only the beauty of the work, and how gorgeous it'll be when you play it.
You get up to 5 downloads per 24 hours at this site with a free membership. Lots more for $25/year.
You can buy the book -
Tchaikowsky Children's Album Peter Ilyich Tchaikowsky - Late Intermediate Classical Piano Series for cheap at
https://www.music44.com/X/product/K04018-DDominus vobiscum.