Congratulations! Not sure if @Glitch_Games still maintains the website but here is the showcase website where you can submit your game. → https://www.madewithsolar2d.com/
About releasing the game on Google Play: I don’t think it’s something you can’t handle. Mostly same as the App Store. Following these 3 pages from the documentation should get most of it done:
Project Build Settings - Solar2D Documentation — Developer Guides | Building/Distribution
Signing and Building — Android - Solar2D Documentation — Developer Guides | Building/Distribution
Android Adaptive Icons - Solar2D Documentation — Developer Guides | Building/Distribution
Google IAP - Solar2D Documentation — Plugins | google-iap-billing-v2
I’ve also asked something about releasing a game on Google Play some time ago. Here is the related topic: Releasing a game on Google Play Store