To be honest, it was tough and stressful the first month or two. My eldest is clingy, which didn't make it any easier. It's good to have snacks on hand and prepare everything the night before for the eldest child. It becomes easier after about 3 months. But I always have to prepare a lot for outings and schedule things around their naptimes. My eldest required and still requires a lot of attention, so luckily the twins are easier.
You will be fine though!