I wanted to try to say from the present time or from a little bit later, but it doesn't mean forever crossing the day. So I don't think '' from now on'' is right here because probably it means it will continue over the day and I am compelled to do that for certain reasons. In that case, ''now'' is better? I don' t know.


Thank you for correcting me.

Yes, "I have to start learning collocations now" is the right way to say it - it implies that you will start and keep going. "From now on" sounds less natural because this phrase implies a habit - something you plan to do on a regular basis for a long time.

Here are some examples:
"From now on, I'm going to check my email every day."
"The professor decided that from now on, he won't accept any work turned in late."
"From now on, vaccinated customers can enter the store without masks."

Thank you for your explanation with examples. I understood it.