Offtopic question: I got the project at 80% of the MVP, would you recommend me to post it and get some feedback or wait till everything is up?
I would recommend you wait till you are done with organizing your project, though it's not bad asking for feedback, but you can always know what it is users would like regarding the particular project you are working on without asking them. Those requests for feedback on projects that aren't ready yet most times makes the organizers/managers look like novices.
since the project is a little bit risky and no idea if people will like it.
Every new project this days is a risk, as they are hardly able to get any hype nor able to market their product substantially, think twice before you launch a project at this time in the market(bear period).