Daniel in the RedBull
I recommend that you do not take your new print out of its packing until you are ready to frame it!! (Patience, Grasshopper)
Art supply stores should stock a 24" x 20" frame in which you can simply place the print and be done. Many will, for a reasonable fee, take your purchased frame, clean the glass and mount the print with archival cardboard so that all you have to do is hang it up.
Or feel free to go nuts with optional matting and custom frames. Send me a pic when you have it up!