I just changed the oil on 2018 RT a couple weeks ago, for first time. Had a 2011 RT before, and changed it all the time. I never took off the belly pan, didn’t jack it up or anything. Take off the right side panel so you can get oil filter out. I used a rubber pan that goes under a water heater, you can get them at home depot or Lowe’s for like 8 or 9 dollars. Low side, fits right under spyder. Warm up engine, then loosen main engine plug on left side, don’t take it all the way out, just loosen it enough to let oil run out real good. Otherwise if you take it clear out, it’ll run everywhere. Do the same with transmission plug on right side, water heater pan works good for this, you can catch both of them with one pan. Do this about 1130, that way you can go eat, and give them both time to drain. When you get done eating they should be drained, that way there’s no mess. Take plugs out, continue with oil change. Good luck, it’s really pretty easy