There are many different online gantt charts to choose from. What suits for your personally, depends on what your team needs. Some people like rough planning and some need to get every detail out there. Teamweek is more suited for making rough plans, and changing them as the progress goes along.
The planning is very easy. Just click and drag. And when you feel the project plan you made just needs a little adjustment, all you need to do is drag and drop.
Making planning easy means you can put more time into the tasks that matter. So you could do your job as efficiently as possible. And go home and live your life.
Set up daily reminders and tick tasks done to have a better overview of your current status.