“I say we give it a try.”
You and your boyfriend are deciding what restaurant to eat at tonight. You're considering a restaurant that you've never been to before. You're not sure if it will be good, but you'd like to try it.
I say we give it a try.
When you're making a decision together with a other people, you can tell them your opinion by saying "I say we ___."
I say we skip cooking tonight and order some takeout.
I say we all call it a day and go home early.
This phrase is neutral: not too positive or too negative, not too casual or too formal.
"Give it a try" just means "try it", but sounds a little more casual:
Give it a try. I think you'll like it.
OK, I'll give it a try.
You can use this phrase to talk about all different kinds of experiences and decisions.