I guess the end of the day the question is your end goal(?) Looking for being OP in the game? Gotta cash at least a little. Looking to just burn some time away? Don't need to cash. Need the hentai? Err we have an active thread in this forum for that.
You playing freemium, there's nothing wrong with that. If you're seeking advice over here, you might want to specify that very point, and take notes that we don't have much experience on the f2p side of things.