Questions about new Tales of Adventure booster for char/job leveling

[LocalHost]

Hello all!

So I've not played since early release. I own all the expansions but have not found time to play. I really want to get back into the game and an expansion is perfect for this typically but I'm not sure if that's possible with these boosters that will be available on the store given how FF 14's classes and levels work.

So my question is. If I buy one of each of these boosters, will I be able to start the StormBlood content on launch day and if so, will I be able to run any of the new dungeons when I reach them in StormBlood or will gear/weapon be an issue?

Researching, It appears there just is not enough time for me to complete everything needed by release without using these boosters "unless I quit my job", but don't want to waste the money on them if I can't get in on the ground floor of the expansion, meet some people and start working together with them. Maybe find a nice FC.

Thank you!