Remove mag disconnect safety. It took 3 seconds and was the first thing I did. I also polished the feed ramp, but I do that with all my pistols.
You should also clean out the striker channel. Easy to do while removing the mag disconnect. For some reason, Ruger doesn't clean that out before shipping and some people have had a problem with gunk in there interfering with the striker movement. Easy to fix, but annoying. Youtube can show you how to do those items.