I decided to wait and I'll do it after dinner
Are you sure doing this is a good idea?
It'll be fine.
It's easy to procrastinate when you have a big job to do, but you should try to get started as soon as possible. If you wait too long to get started, you may run out of time.
I think it's not a big deal to do it later.
Don't let this be a habit for you. Getting things done quickly is always best.