No we are starting at level 1 and doing sunless citadel and probably forge of fury , then going back to our other campaign. We are doing yawning portal stuff while the DM refreshes himself in the Homebrew he does (Im a 10th level druid there)
lanliss I sent you a pm
Starting at 1st level, I wouldn't change a whole lot. I might play a little carefully, since base Rogue doesn't handle melee as well as Swashbuckler. Other than that, it would pretty much go how I had it above, unless a story opportunity presents itself for you to go Warlock early. Maybe a Patron that could help you, but you need to take the Deal now, not later.
I would also decide for sure if I am going to go Warlock, because your DM could slowly tie it into the story rather than it coming up all at once the day you decide to multiclass. Maybe the kind merchant and/or inn owner who has been grooming your party is actually an Otherworldly Patron in disguise, and sees a little something extra in you that he/she could use.