It can be tricky to enter the country on a one-way ticket. Technically if you don’t have a residency visa in your passport you are supposed to have a return ticket. But…often immigration agents don’t check to see if you have a return ticket and it’s not an issue. However, if you get a by-the-book immigration agent they could choose to send you back to your country of origin and/or your airline may not let you board without a return ticket because if it is decided that you need to return it is done at the airline’s expense.
You could check with your airline and see what options you have in the way of refunds if you end up not needing to use your return ticket. Good luck!