Hey Im planning to release my game and I want to continuously update whenever i am free. I plan to actually release it for money when I finish it but for now I have it as a prototype anyone can test. Is my plan viable or is there funnier/more effective ways to beta test my game

It will probably be more effective to market the game on social media or discord and offer the full game for free in exchange for beta testing and providing feedback on the prototypes.  

just make it clear that its early access. you can set the project as "in development" but it wouldn't hurt to mention it in the description also.

Its worthwhile to do devlogs if your updating a lot in my experience. Both for the user and your own little dev diary.

Good Luck!

Maybe only upload prototypes that mark drastic growth in the games development and keep promoting the full release online for others to see if they’re interested. I feel like having a game actively available for free until it’s not would lose the anticipation.