I think it depends on how you function as a player in games in general. I played a bunch of normals after 30 and then hit bronze 3 the first time I played ranked. I hadn't improved bc I was focused on win/loss and my nomals mmr dropped until I played opponents where I was even on win/loss and so I had false hope I'd be like silver level.
For me, I need the rank to motivate me to focus on improving, and I don't mind a low placement bc I just need to improve to go higher. Some people though are really great at playing a game and regardless of win/loss focusing on what they could have done better and how to improve their play. That type of player does great practicing in normals before going to ranked and playing a lot. I'd say if you manage to hit 30 before Nov 11 play your 10 provisional games if you can to get a badge for this season. My roommate got me into the game back in season 2 and I'm so sad I didn't hit 30 till preseason of 3. I really wish I had a season 2 emblem even if it would have been bronze, but I guess santa baron is kinda cool too. :(