Hey there,
I'd reach out to your brokerage. Typically, there is a form you'll have to fill out and that will likely vary by broker. The key thing to remember is that you can transfer your accounts in-kind - so you shouldn't have to sell your stocks and then buy them back in the RRIF. Of note, RRIF is just an account type and you can hold multiple types of investments such as GICs, bonds, stocks, etfs, etc.
Bottom line, it should be fairly simple to transfer what you have in your RRSP to the RRIF but each broker likely has their own process to follow. With that in mind, I'd flip them a message asking them how to do that.
Mat
Mat